Changing seats in a 2001 mustang svt Cobra?
If its the condition of the seats that you are not happy with, but the funcionality is fine. Go to a trim shop and have them recovered with leather. Shops around here will do it for around $500 to $900 and they come with a 3 year 36000 mile warranty.
Otherwise, changing the whole seat is easy, but your still getting an old seat, remember.