Fleabay win. My daily’s cabin fan was trying to set the car on fire yesterday; brushes worn, commutator eroded, speed regulator transistors failed.
For the usual landed cost of a new speed control module I found an NOS complete fan unit with the module. Added it to my watch list Wednesday night while I considered if there were better options.
Couldn’t think of any, and then out of the blue, the seller tendered one of those “private offers” less 20% on price. Done, and at £10 less than expected.