I'm going to try an approach using one of the pancake computer fans. So please don't hold any parts for me. Will post the results when I complete it. I'm likely to reuse the core and bottom mount but fabricate a new top.
Just took apart my rear heater to see why the fan wasn't working. The fan motor and blade are missing. I don't even have a core to rewind. From a few searches, these seem to be made of Unobtanium. Any suggestions for a substitute? Anybody adapt a computer fan to this or other suggestions?