http://budgetlightforum.com/search?q_as=3xAA
sort by date — it’s been a few weeks and so I can’t tell you what’s available now, but you can find them from time to time.
You can get creative searching if you want to spend the time sorting through an ’oogle-barf:
https://www.google.com/search?q=flashlight+AND%223xAA%22+OR%223+AA%22-AAA&ie=utf-8&oe=utf-8#q=flashlight+AND%223xAA%22+OR%223+AA%22-AAA±xenon+AND+CNQG+OR+DX
One trick that often works is to find the 2xAA “3W Police” lights for under $2 somewhere (they come and go) and screw the battery tube into the tail of a Sipik SK68 or #3 zoomie.
http://budgetlightforum.com/search?q_as=police%20sk68%20lego
Or here’s what claims to be a 20-watt (laugh) 3xAA “Police”: http://www.ebay.com/itm/FREE-Shipping-POLICE-350LM-White-LED-3AA-Handy-Camping-Flashlight-Torch-NEW-/140928099821
Mostly you’ll find crappy multiple 5mm LEDs in eBay lights: LumaGear RP1403 Anodized Aluminum 4-LED Flashlight with 3 "AA" Batteries for sale online | eBay
Of course, searching here at BLF (search box, upper left corner) is endlessly fascinating, tho’ some of the sources are defunct (like Manafont, long gone)
RaceR`s 3xAA P60 host.
Modding the Lethargic Lanshi LS-125 3xAA
Hmmmm, I guess the 3AA “Police” might Lego/Frankenstein into a 4xAA light, if that 3xAA thread fits a SK68.
But no. I’ve got to stop somewhere.
Don’t I?