OER Parts offers a wide selection of Foam Padding & Seat Buns for your 1971 Plymouth Duster. OER Parts offers 1971 Plymouth Duster Standard Seat Foam, 1971 Plymouth Duster Deluxe Seat Foam, 1971 Plymouth Duster Seat Burlap Set, 1971 Plymouth Duster Universal Seat Foam, 1971 Plymouth Duster Bucket Seat Foam, 1971 Plymouth Duster Front Split-Bench Seat Foam, and 1971 Plymouth Duster Rear Bench Seat Foam.