A1 Auto recyclers in Colorado Springs just got in a 1990 GP (**NOT TGP) that has grey leather and DIC, didn't look at the drivers or pass seat (covers on them) but the rear seats are in good shape. The rest of the interior is in good shape also, it has a digital dash, no HUD.
Did you happen to see if it had center controls for all the power goodies in the seat? Always looking for a grey leather seat in better shape than the one I got..