Steve, Have you checked with Corvette Specialties of Maryland 410-795-3180. They are well known for wiper and headlight motor restorations. Maybe they do window motors too. Also I found J Pinto 570-839-3441,
http://pluto.spaceports.com/-electrical . Restores anything automotive electrical with a few days turnaround. Web sight is one of those shopping things. Never did find him. You should probably call the number. I hope one of these places can help. Tom