round plastic filter cassettes

lightyear

WTB: Circular plastic cassettes for filters: clear plastic top screws into black plastic bottom. IN the dim, dark past filters from Hoya, Kenko came this way, and Nikon & Canon also sold filters this way but the Nikon bottoms are white, don't know about Canon. I need 67, 72, 77mm sizes, about 6 of EACH size. New filters now come in rectangular plastic cassettes, which don't fit my shooting bag well.
I NOW HAVE THEM. REPLIES APPRECIATED.

thanks./

Stan