You can find old stock, U.S. made suspension and steering parts on Ebay. Beautiful, heavy duty stuff. You might not be able to get all the same brand, but Moog, TRW, McQuay-Norris, etc. from 1970s-1990s are available. Prices are pretty good. Often a good bit less than the new Chinese made crap. For my car, it took a little while to find a small sector shaft pittman arm, but I got one, and another a week later for ten bucks. Too cheap to pass up.
Somewhere there's a webpage with a cross reference for part numbers for about 25 different brand names. It helps with the searching. If you'd like, I'll try to find it and post it here.