I would either take it to my brother in law who owns a shop here in town and has always helped out with Z related things, or there was a member here that lives about an hour and a half that has done just about anything and everything imaginable with these cars that I have considered taking it to. I contacted him years ago, but he has not been active on this site for quite some time so I'm not even sure he's an option anymore.
Parts are definitely a concern. Sourcing good parts in my area is next to impossible.