Diamond,
If you like SOE's stuff, their M2 holster will hold the G2, and the bottom of the pouch has the nice "Mil" feature of turning your accidental light discharges into a nice, subdued "red" lamp, good for close-in map-reading, etc.
SOE's direct website is:
http://www.soegear.com/
The pouch attaches with a Velcro loop, and can be secured with up to 2-inch "duty" belts.
I think mine was something like $15 or $20.
SOE makes serious, no-bull gear that's worn by some of our countrie's finest. Their worksmanship and quality are among the best of the best in the "tactical nylon" industry, and is a step above companies like BlackHawk, etc. Their inherent quality is even evident on something as small as this pouch.
=)
It's less bulky than the SureFire V70 polymer carrier in that it snugs up to your belt a bit more. I typically carry my Z2/C2 in a bezel-down format, bezel-up is obviously no-problem. With the G2, because the bezel is just ever so slightly thicker than their metal counterparts', bezel-up carry is A-OK, but if you'd like bezel-down with the SOE M2 pouch, you'll have to do a bit of "squeezing" at first. However, as with all such gear, they'll expand slightly over time, and after storing your light in the pouch for just a few days, you'll find that bezel-down won't be a problem, either.
Allen
aka DumboRAT