good luck, and i say that in the nicest way possible. your best bet is a junkyard. i havent tried through autozone and such but I can't imagine them carrying them. I have a text out to my buddy that works at advanced.
Find the size and thread count/pitch. go to local hardware store pick up something grade 8 or better in that size... 5 dollars tops. Also as a potential help the 84-95 (iirc) all had the same setup