Craig, try Mr G's Fasteners in Dallas. He has every kind of fastener ever made for anything. The guy is very nice and very helpful.

Automotive fasteners, of all types

Mr. G's Enterprises
5613 Elliot Reeder Road
Fort Worth, Texas 76117-6013
817-831-3501 or 817-838-3131
https://mrgusa.com/

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)