Martin at Dyna-tronics could easily be named the Reanimator!. He brought back to life an old but valued component that ordinary shops couldn't or wouldn't want to bother with. Replacement parts had ceased being available for years so Martin tore into the original part and replaced bits that were almost microscopic. I can't imagine other shops even knowing how to do this, let be willing to spend the time.
So my system is whole and working again - Hat's off to Martin and Dyna-tronics!