I just added some information. Letting you know due to this being on a new page.
Cool. Appreciate it. I've been looking at parts on a site called "LEDsupply" and daydreaming about what I might put together to mod a couple of old lights (Task Force 2C, and River Rock 2C). Problem is, my knowledge of electronics is VERY limited!!
Some basic automotive stuff is about all I've done.
To keep this from veering too far off-topic, I'll segue into mentioning for the OP's sake that customizers have done some pretty neat things with D-cell Mags for years and years, so that might be worth searching CPF for threads.
The LED site I mentioned even has a link to a CPF thread on this page!!
(scroll to the end to find it)
Before purchase be sure to review this resource and guide to understanding LED flashlights and flashlight conversion kits.
www.ledsupply.com