I don't think repops exist. I bought a parts car to get good quarters plus other parts. Paid more for it than I did for my running car back in the 1970's. LOL
Auto Body Speacialties sells 2 piece lower 1/4 sections for about $150 each.I,m getting a complete 66 Dart 1/4 with wheelwell and trunk extension from Desert Valley Auto.There,s no parts cars(rust-free)in my area,period.