Looking color film strip that is on the bottom of a Glitter gemlite

[Becki S Walker]

It seems somewhere I saw a post of where you can get a heat proof color strip for a vintage Glitter gemlite that reflects color with the help of the bulb up through the bottom of the globe onto the silver confetti...Mine is still working fine but I thought I would try it on a clear/silver glitter globe, 52 and 32oz...Does anyone know where I can find some of this specialty color film??