Filter for C8/MRV sized flashlights

Anybody knows where to get it (it must be really budget! - so preferably china seller)

SO that would be 41mm filter lens, if Im not mistaken, or 45mm filter-adapter (44,5 is C8 bezel diammeter, I think)

Most preferably of green colour.

I cant find any such filters on the web.

Only on alibaba I've found some filter manafacturers, but ordering from them (10pcs for example) would be too complicated I think.

I know only for adapters with filters for 42mm and 49mm bezel flashlights... (I mean, in this size range). Bt i need it in the middle, for 45mm bezel, or just coloured glass lens with diammeter of 41-42mm). Its crazy that sellers dont have it.

It is quite possible that the 49mm ones will work with filters for Pentax cameras. Worth a try if you can find cheep ones anyway.

Are you going to be taking it on and off or just leaving it on?
If you are going to leave it on and can get behind the lens then you can just order filter material (sheets of plastic) from Lee Filters (and cut it to size yourself).
I don’t know how you would use camera filters. Cameras have thread lens. Most filters are threaded as well. Some aren’t and need to be used with threaded adapters.
I don’t know how it works on flashlights where the lens isn’t threaded.

I’m not sure regarding the prices. I know about Lee Filters only because I ordered their sample pack which is only $2 or something like that. Those sample filters are only about 1" x 3". That’s enough to use as a filter on a smaller flashlight which is what I’ve used them for.
I just assumed a small filter of the size you need would not be too expensive. Their primary customer however is the TV/Movie?Theatrical industry. Maybe their smaller filter is still too large and expensive.
You could order two sample packs and find the color you want and just use two filters to make a single larger filter. Depending on your use the line in the middle might not be a factor.

Yes, the Lee Filters are just cellephane more or less. You can cut them with scissors easily.

If you can get a piece the right size you don’t need to glue it. Just put it behind the lens. If you are using two smaller pieces you could use clear glue sticks (water soluble)just enough to keep the pieces together.
Using a spare lens sounds like a good idea.