Post pics of your seats!

The FR500 seat covers are available at http://www.classicsofttrim.com/index.html. They used to be available through the Ford dealer but Classic Soft Trim has always been the manufacturer. Be ready to spend about 1200-1500 bucks and that is just for seat covers, not seats. There are other options like http://www.katzkin.com/SITE/HTML/index.html but, even there you are looking at about 800-1300 bucks for seat covers. You can also price Ford leather covers as well as the foam for your seats as the frames should be the same. For the money though I would go aftermarket as the leather quality is going to be better.

It is hard to tell without actually being able to see them in person. Just keep in mind the old saying "you get what you pay for". Leather is expensive and even more so if you have to replace it every few years.