Don't see why it shouldn't fit those cars. It's currently got a mounting bracket made up to mount in the original WMIC on a S13. I would of thought it could be taken off or adapted to fit those cars. And just have some pipework made up.
Kent_S13 (sxoc.com) makes braided oil and water feeds, would of thought these would do?
the sandwich plate should fit S13, R32 R33, but the S14 oil filter is loads smaller so I'd imagine you'd need a different one... could be wrong though.........