Called a local repair man who did not return the call. Called another one who turned out to have a you pull it salvage yard for washing machines. Got on the internet and found AppliancePartsPros.com. Entered the model number which put me onto the assembly drawings. Picked out the knob parts. watched the videos for instructions on how to remove the old parts and assemble the new ones. Ordered the parts. When they arrived most of the assembly work shown had already been done. Took me about two minutes to replace the old parts and test them.
Perfection.