Hi and welcome to the forum S2000!
Honestly, I don’t think you will find that light ready to be bought.
I built something more or less similar a while ago.
I had some 1xAA hosts, bought drivers from member gchart and used whatever LEDs I wanted/had back then (white leds, not red).
You can find some more information in this thread: AA Flashlights - "Cockroach" / "Vampire" / "Drain-me-till-I'm-empty" - #72 by gchart
If I remember correctly, member gchart was making 1 or 2 x AA/AAA drivers. I am not sure if he is still making them.
Please note that the aim of those lights/drivers is to use batteries “juice” till the last drop.