Need to pick brains!!!!!

My X wife managed to move out of state taking my seat's with her thinking I won't be able to finish my restoration on my 68 cuda convertable it has a ralley package interior. So I need to know if there is interchangeable buckets and rear frames I can look for from wrecking yards I could get and recover do convertables take a special rear seat??? Any and all help is greatly appreciated:banghead::banghead::banghead: