The guys over on the HAMB message board might be able to help you, they are pretty resourceful. You will need to sign up, but its free. Do an introduction, and ask for help. There is a very active parts for sale section, and there is a parts wanted, but often its watched by scammers. The guys there are pretty hard core pre 64 traditional, so you don't want to mention a rat rod, or a modern chassis and drive train.
Good luck on your search. Gene
The HAMB is the best place I've found for automotive metal working. Drives me nuts that I can't post questions about my muscle cars though. Or even mention them for that matter.
The Garage Journal is a sister site and it has a pretty good fab forum too.
https://www.garagejournal.com/forum/
