There's not too many SFI pressure plates in the diaphram style. SPEC is probably the hot ticket lately. Hayes makes one, but I wouldn't put a Hayes in a Yugo. When I was going through things last year, Ram's diaphram wasn't SFI approved since its actually made by Valeo and Ram can't get third party product approved. If you move to a long style pressure plate, you've got more choices such as Ram and McCleod. I put the numbers for everything inside my driver's side door jam so I could provide them to the tech officials on request.
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Jeff Chambers
Trophy Stock #3
11.462 Seconds / 117.43 MPH
Chambers Racing Team