I have a bathroom faucet installed in 1992 that has started leaking from the cold side. I have looked all over the faucet and cannot find any indication of the manufacturer. I have had it apart, and the cartridge is metal, with two ceramic (maybe?) white parts inside that actually turn to allow water flow. It looks similar to one I saw from Rohl and Pfister, but Pfister said it wasn't theirs and I haven't heard back from Rohl. Would appreciate any help in identifying this. If needed, I can disassemble it again and take a picture of the cartridge. Thanks!