There are some aftermarket parts companys out there, Paddock parts has free catalogs and Original Parts Group and im sure there are others
I have found that parts are fairly expensive but there are lots of things available..
the salvage cars (parts cars) are few and far between anymore as most have been picked clean and scrapped long ago
and the ones left are bringing a premium price, you can pick up an issue of any car mag and find parts for just about anything but be prepaired to pay dearly for reproduction parts.