Welcome Pointermachineworks.
Lumintop offers a version of the Tool AA, they refer to as the “Tool AA 2.0 HM Homemade EDC Flashlight Kit” that includes a modular LED and Driver drop-on of a sort. It’s definitely smaller than an S2.
How about making the pill yourself? Mountain Electronics sells 15mm FET+1 driver, so you could have a small but powerful solution.
> The basic design of the light is a side by side 14500 set up parallel
here is one vendors opinion about using Two Batteries
“we STRONGLY ADVISE AGAINST THEIR USE. Catastrophic failure can occur when one of the two cells is not functioning correctly, causing thermal runaway in the other cell. There is a significant risk of fire and/or explosion when using two cells.“
Your link goes to a light that takes 2 cells in series.
oops,
In Parallel does not have the risks of In Series
thank you PinkPanda
@pointermachineworks, I hope it turns out to be an awesome Two Parallel Cell Light 
I hear the AA/14500 Synergy is Two Parallel Cell too
good luck with the project
post pictures
PinkPanda is very savvy about building lights… hopefully will be able to offer you more useful advice, than I have so far.
Welcome to BLF
Don't forget to make a 2x 18650 version at the same time .Seems like if it's a good design then either downsizing it and or upsizing it makes good sense .
I think a slide snap in mount for a bike light may give it some extra appeal as well as open up another possible market .
2xAA side by side done right has always been a bit elusive. yeah it's easy to do it if it's titanium and the light costs an arm and a leg .
The old school plastic lights ought to prove it can be done right .
Welcome to BLF pointermachineworks! Good luck with your flashlight design and looking forward to updates.
Thanks everyone, looks like I am going to have to make the pills my self. I emailed mtnelectronics and am waiting to hear back about some of there smaller drivers. I started out wanting to use somewhat standard parts but am no going to make nearly every component in house so that i do not have to settle. the design is changing by the second but as soon as i have it a little closer i will be sure to share.
No idea what size (min/max) you want for pills, but czech out fastttech.com first, as they got assloads of pills in all sorts of diameters/heights.
I got like 3 different types of brass pills that fit C8s to replace the crappy featherweight Al pills that came-with.
Pickin’ is less than it used to be, but…
https://www.fasttech.com/category/1616/flashlight-diy-parts-miscellaneous-parts
Thanks for the input everyone, Im moving along with my design and have decided to change the button and that is going to change most of my components. I want to go to an electronic button, the nature of my design just isn’t lending its self to a clicky/ latching button. Now i need a driver capable of running on an electronic/ momentary button with the lowest parasitic draw possible. I see mtnelectronics has a qlite driver that can run this type of switch, any other recommendations? looking to use a cree xml2 emitter. Also any sources of good electronic buttons? They are extremely hard to find.
I get the impression this is a huge learning experience for you 
It most certainly is. Im figuring things out the best I can though, sourcing components is seeming to be the hardest part as none of the parts are made in the us, they are never properly represented on line and their availability is spotty.
I was going to suggest contacting TexasLumens but it looks like they no longer have any Website. I don’t know if the business closed down…???
What im looking for in a button is really just the outside metal cap/retainer that screws in on side button lights. I can set up my own tactile switch underneath i just need a screw in metal cover/button.
The only thing that springs to mind is the convoy metal button which is not US made, of course.
Unlike rubber boots, metal buttons are usually a proprietary item on hosts. So there is very little available.
It kinda sounds to me like you are trying to piece together a ‘new flashlight design’ from existing available parts. For a tubular host that’s almost possible but for a side by side cell light that sounds like an impossibility. Or do i have that wrong… are you having a new host produced at a local machine shop?
Maybe get a metal switch for a Convoy S2+. Screw-in design…
Dee-oh! Beat me by seconds…
I beat you… did i win…?? What’s my prize??? 
I’m looking into those convoy buttons, the lead time in then isn’t great and it would be nice to have something in my hand quickly to know if it won’t work. I’m designing a side by side light from the ground up to hopefully produce and really at this point the only thing I’m not machining my self is the button but I’m thinking I will have to make that as well. Something like a piston in a sleeve with o rings or a similar design to the s2 metal buttons with a silicone boot only more flush and have it interface with a tactile micro switch. I’m trying to keep it as compact as possible.
DQG Tiny did some pretty small side switch assemblies. Some had a rubber boot, some had a metal button but all had a press fit retainer. I’m guessing that will save you a little bit of machine time if you press fit rather than thread.