What does the cleaner do or not do? What's wrong with it? 

What's the model number and serial number of the cleaner?

I am not 100% certain, but the guy at the repair shop may have told you what he told you because he didn't want to work on the cleaner.  You may try taking it to another repair shop -- perhaps one of the stores that used to be a Hoover store -- if you have any in your area that are still operating as an independent vacuum store. 

I would be certain that the printed circuit boards are NLA, but the cord reel may still be available, or you may be able to scrap one out of a different machine.  I seem to recall that the Concept 1 used the same cord winder, but I could be wrong.  I would imagine it could be just a problem with the cord; as that would be a more likely thing to break than the printed circuit board.

Those machines are hard to come-by, they're either dead or more likely--still in use.

Fred