Anyone local to me capable of correcting errors on a 904 race build

Duane said
I agree with what you have said, however
a business person who was short with me on the phone, won’t deter me from persuing
$$4,500. And there is no way I would then spend another several thousand dollars somewhere else to get the problem resolved.
That is on the Op.

The parts are already bought and paid for so this rebuild won’t have those costs added in. I know how much it cost to freshen a transmission and what markup is. There’s no way this repair should cost the money you just quoted.