Dart Swinger seat covers . . . need help

Legendary is having a December sale, and I've been in contact with them. I have a 1973 Dart Swinger. Problem I'm having is that I have buckets in the front and 1973 Dart Swingers did not come with buckets (sez Legendary). Previous owner sez they are out of a 1974 Valiant. I understand that the high back bucket Abody frames are the same and should be ok for recover. If I recover them, they will not match the rear bench (if I stay with 1973 design). I may be able to go with 1973 Duster (maybe Demon/Dart Sport too) buckets and rear bench. Does anyone know if the rear bench in Dart Swingers are the same frame as the Duster fixed rear seat? If it is, I could then go with that set the 1973 Duster front and back. Another option would be to go with a set from a 71 or 72 Dart Swinger. I also have to consider the match with the door panels. Any input or ideas? Help! Thanks, Rog