California is known for custom interior restorers. Should be one in your town. Even here in Cornfield, Illinois we have two old timie interior customizers. Check on-line and newspapers.
You don't say what you are looking for, but I don't know how much luck you are going to have finding NOS pieces. These guys are your best bet for that. http://www.greensalescompany.com/ This is also a good place to check (not NOS though). They are expensive, but good. https://smsautofabrics.com/
Thanks! Yeah, I guess I could have been more clear. I need to get my front bench seat redone. I was thinking about giving SMS a call. They had (NOS) fabric for our Comet when we first bought it and still had the same fabric 13 years later!