Look on the exterior parts board. Theres a couple of members that are pretty good at coming across early A parts. 63-66 A,s will work not 100% sure about the Darts
The op didn't say what car he was working on but I would stay with the same model for the donor car parts. There may be a difference between Dart and Valiant/Barracuda. For instance, the firewall is different between the 63 and 64-66 Darts.