I thought that it would fit in my pistol mag pouch on my holster....Wrong! Does anyone know of a nice small pouch it would work in?
Look for pouches for strobes and compasses.
They should be about 2x as wide as the pistol mag pouches.
I've been looking for one for my Insight M3, so I'll let you know if I find one I like.
Tactical Tailor Grenade Pouch
Tactical Tailor Strobe/Compass Pouch
Have you considered something along these lines?
If you want an actual pouch the previous suggestions will work well.