First Flashlight build!

22mm driver? Hang on…

Yah, here ya go. Ultrafire F13 mod

22mm boost driver, but for a 3V LED:

https://www.aliexpress.com/item/5-Mode-1Mode-Input-3V-15V-dc-22mm-LED-Driver-For-Cree-10W-T6-XML-T6/32746300708.html

There are similar ones that’d be similar, just check the output voltages. But AX is a good place to start, Fasttech also.

You can pick 1-mode, multimodes, etc. Just goggle around, post here any contenders you find.