I'm searching for a host which will be used for parts in a single emitter build. I aim to make a light using just the head and tail cap. I prefer that the head have a nice deep reflector. The deeper the better. I would like the tail cap to have enough depth to modify or replace the switch. I will be throwing the body away and making my own unless it's able to accommodate 2 18650's or even 26650's. I will be machining the head to accept my own custom pill like below. It's a Convoy C8 donor in this case.

Here's what it looks like all together.

I've been looking for a C10 because it reportedly has a somewhat deeper reflector than the C8 but they seem to be vaporware as hosts. I'd like to just buy a host w/o the guts in it. No sense buying stuff I won't use.
Any suggestions?
Buck