I think your looking for the GTA TransAm wheels or of course, the Grand Nationals. They look very similiar. Not completely sure the Grand Nationals are the proper offset for a third gen but I bet they are close. Ebay is probably the best source. Here's a set of decent GTA style...just paint the centers black. I have a set on my RS. They are actually the lightest factory wheel for the 3rd gen F bodies. You can actually feel the car accelerate a little better with them.
http://cgi.ebay.com/ebaymotors/82-92...QQcmdZViewItem