I've never heard of OCAP brand before. FCPEuro also has
Meyle brand control arms that are cheaper than TRW. I've used their brake parts before, and they were fine. But the price difference between Meyle and TRW (from PelicanParts) is not that much, might as well get TRW. You're in California, so might be able to save on tax when buy from out of state (such as FCPEuro).