Want to Buy WTB: Series 4.5 filters

Anyone have any of those tiny drop in filters? I just picked up a Bolex 8mm and would like to find some filters. I'm hoping to get yellow, red or orange.
Thanks,
Matt

Chambless has them. Think about a ND also. I like to keep the aperture wider than f 5.6 or 8 and I use a 0.9ND (3 stops) for all my outdoor shooting.

Here is one I got from Chambless.