Does anyone make 26650 battery tubes for various C8 lights?

Just mentioned in another thread that the F13 is nice and throwy. Mod it. Off-the-rack it kinda stinks, but is a beautiful host. Takes a 26650, but comes with a sleeve for an 18650, and the ones I got even had carriers for 3×AAA!

See Ultrafire F13 mod . Use a HI if you want more throw.