If you do pick up a set I would suggest you stay away from the 99+ seats. They are not very comfortable, you sit on top of them and not in them. I know I guy with a 95 GT and the seats seam much more comfortable and wrap around you a bit more.
You might find a seat by Corbeau for a little more money that would be a ton more comfortable.
I have a full set from a 93 GT, grey. And a back seat from an 85 GT, light grey with red piping. The 93 has electric lumbar support and all the adjustments. Was planning to install them in my fastback. PM me if your interested.