My 1972 F7 Dart Swinger

PG Classics sells the foam. you could use a 70/71 frame and foam with a 72 cover. I'd do a new frame but then I'd still have to buy the handles, tracks, seat backs, foam, etc. hoping to find some with decent foam then I'll just pick up some tracks. If I can find 72 seats, the foam will need to be in good condition since those aren't remade
A side note: I don't have much good to say about most of the aftermarket stuff I bought to bring my interior back. I have issues with legendary door panels but the seat upholstery was good considering all the hell I went through with twisting, moving hog rings, pulling some areas Really tight etc., It held up very well to the fight.

One thing to know. I had to buy new seat backs because I went back to my original color which is white. I don't know if there are different manufacturers but the ones I bought I would not buy again if I had a choice. They look really good BUT they are not the same type of plastic as the originals and that seems inexcusable. The originals are thicker and a forgiving softer plastic where these are very stiff and somewhat brittle. the bends at the bottom where they cover the pivot bolts are a little off and when I flexed them a slight bit I put a small crack in the bottom which isn't really noticeable but there none the less. the material at that point was extremely thin. I really couldn't complain to them because I had this stuff for at least a couple of years before I got to it. Be sure to verify that in your search.