Window Regulator

you'll need to weld build that section and file cut the new teeth in it but more iimportantly you need to rebuild the drive gear assembly. Go in the rear door panel of any 4 door car and drill the rivets out of that driver housing (cordless drill and 3/16" bit) . No need to remove the entire regulater or glass there. You'll also need replacement rivets, vise grips to whip that spring, etc..