My leather is pretty sun-cracked in back, but since I don't usually have people back there (it is where my dogs would normally ride when not being transported in my truck) I took a pretty heavy-duty, rubber-backed carpeted mat, about 5 x 4, made a mounting bracket with straps which attaches to a rod & rides in those plastic closet-rod brackets: it fits behind the seat against the C-panels and holds the carpeted mat almost perfectly covering the seat cushion & seatback.
GoWolfpack, take your car to a couple local, small upholstery shops and ask them what they would charge to re-pad and cut a cover for your backseat in marine vinyl. Learn how to remove/re-install the seat and tell them you will remove the seat: all they have to do is cut the pads and cover it. You might be surprized how reasonable it could be. They might even give you a reasonable bid for your fronts, too.
I believe you can buy pretty good quality front & rear custom covers @ J.C. Whitney in vinyl for under $500, but you still are looking at pads, etc. Worth a call, anyway. This was kinda' my plan until I solved it for under $55. May still do it someday when I have an urge to spend the dough.
Please let us know what you find out.
