Rudy Fonseca, the owner, is one of the best guys you'll ever meet. He was a bit of a pioneer back in the day. Of course his shop is more of a repair shop and he reclocated there from his other shop/location in Alhambra. Back in the late 80's I traded an 82 320i for a 74tii he had sitting in his lot (tii has since been sold). He's a great mechcanice very thorough, dependable. I'm sure he can help you out with locating parts but I am not sure if that is one of his services.
I put him right up there with Leif (who just recently passed), I just wanted to say he's a great guy! Good luck.