Bushwacker used to make some that were colored in either red, blue, green, orange, or yellow. But they were pretty much just flip up scope lense covers. You can probably go to your local gun store and find some either clear or yellow tented scope lense protectors in the 25 to 30 MM range. Most flashlight have a bezel of at least 1" which is 25.4MM. So if you found one that was a litle snug it would probably work. Or if it was just a hair to large... you can add a layer of electrical tape around your bezel to make for a snug fit. And if you get yellow, it will work better in fog or smoke from what I'm told. An amber beam is supposed to cut through haze better. I am planning to buy a clear one and then sand the lense with some 2000 grit paper to a milky white haze in the hopes it will act as sort of a lantern type filter. Create ambient light instead of a beam. So I can go from lantern effect to beam in just a flip of the cap. Buy something. I dropped my inova about 6 months ago and now the bezel is cracked. Still have yet to sent it in for repair because I use it daily.