Hey Dawso. I had a similar problem several years ago and stripped the fan motor to address a squealing noise. After some research, i ended up buying a brand new matching old school GM fan motor from the US as they are still made. The company was called Old Air Products and the fan was a '20-0105 Blower Motor, 78-82 All with Factory Air'. At the time, the fan was only US$43.50 + shipping. Hope it helps, cheers