I thought I'd start a list of the things that we know are obsoleted, and possible replacement options. I ran into one more this weekend.
We know the Aux shaft is no longer made by Ford, Esslinger makes billet replacement.
If you don get a hold of a NOS Aux shaft, be aware that it does not come with the "cam dowel pin." So don't chuck the bad aux shaft without taking out the pin.
Ford has obsoleted the part, and all though its listed as a 1/4-5/16ths dowel, its not. Because its a press fit its slightly larger. Ask me how I know!!
Anyhow, the Ford dealer states that they are obsolete, he then searched dealerships for any stock. We found some in Escalon, CA, so they were ordered. Curiously, the larges cache was at a dealership in North Dakota...23 in stock.