I called Atwood this morning and talked to a lady in the Fantastic Fan dept.
I told her I needed the 3 position speed switch for my fan and she knew exactly what I was talking about. She responded with. "all I need is a name and address and I'll drop it in the mail". No charge for mailing or the part.
Looks like they are still living up to their reputation as a first rate company. It was so nice to be able to talk to somebody who knows exactly what you want without a big song and dance and a long explanation. I would have considered the service excellent even if I'd had to pay for the part.