High Back A Body Bucket Seats/Help

Hey, I just recently picked up a pair of late 1971 A body buckets to use in my 1972 duster. They need seat covers but the foam is still good. I know that you can't buy 1972 style foams but you can buy the 72 seat covers. I'm just curious if anyone knows if the 1972 covers will fit the 1971 seat foams, or if I'll have to go with 71 covers? Thanks.