Ack, and the issue is my fault! It was stuck solid and after long soaks with Liquid Wrench, hair dryer treatments and Triflow I decided to lightly tap it. And then it broke:<
My other machine doesn't have a problem with its winder, but this one is in such good shape I'll have to keep looking! Let me know if you ever stumble across a hoard of them:> I think the broken parts can be epoxied together, but that doesn't solve the problem of the winder not rotating. It may well be slightly bent or something.