Mike, unfortunately the AWS75 graphics panel (which includes four wash/rinse temperature options) is NLA from Speed Queen, so our plan to replace the temp switch is on hold for now. I'm hoping we eventually find a panel, either a pull or NOS.
We did find pricing for it on two different sites (SQ's part# is 38830W, in case that helps you), one was $28 and the other $25, but neither company had any in stock and they can't order them from SQ.
As for the wiring, I assume the 4-position switch would have four terminals instead of three.