I see that you were looking for a turbo sport coupe a while back? I just posted something you might be interested in.
http://www.turbobuick.com/forums/cars-wanted/338765-wtb-78-79-80-regal.html#post2852519
http://www.turbobuick.com/forums/cars-wanted/338765-wtb-78-79-80-regal.html#post2852519