You can try and see if the seat belts from an S197 would be able to work with your car. The only reason I say that is if seat belts have changed those are probably the newest design. I am sure you can buy new seat belts from a Fox body if yours seem a bit played out or a new mechanism for them. Unless you have a Roll Cage or something to mount them to a 5 point harness is out of the question. There really isn't a whole lot of options that I can think of to be honest.