When it comes to seats, there are several factors to consider.
First, any seat can be installed in your car. From any maker, model, or year. They just may or may not fit in the stock holes and you may need to drill a couple new holes, which is not a big task. If you do drill new holes, be sure to add some reinforcement under the floor area where the new holes are (I use some 2" x 1/8" steel bar stock). Another fix is you can cut the mounting studs off the tracks and weld them back on at the spot they need to be in to fit in the stock holes. Generally speaking, drilling holes is easier, but I would suggest investing in a $100 wire welder from Harbor Freight that will enable you to weld the studs on the seat track and weld lots of other stuff too, so it's a great investment.
Second, if you're wanting to stay vintage Mopar, most all of the bucket seats from 70-80 are all essentially the same under the skin. The foam changes, the backs change, the covers change, but most everything else is the same, so don't pay $500 for a pair of torn up 72 seats when you can buy a pair of torn up 77 Volare/Aspen seats for $50. Buy the seats, buy new foam and covers, take the old crap off and put the new stuff on and no one will know what frame is under the covers.
Lastly, don't be afraid to recover your seats yourself. Just buy some good covers, a big bag of hog rings and some hog ring pliers, watch some how to videos on Youtube, and knock the job out. It's pretty easy, and will save you about a grand by doing it yourself.
