Dodge Demon Rear Seat Compatibility?

Last question on this --- So I have decided I want to order a new seat cover for my 71 demon rear seat, but I'd like it to match the 73 Dart Sport front high back seat pattern...

Can anyone confirm if I can order either a 73 Dart Sport seat cover or a 72 Duster seat cover and it would fit my 71 Demon frame??
***Both of these rear seats would match the front pattern (front to back ribbed cover) that my front seat has.