N,
In my area, no motor shop will even touch a pool pump repair. I believe that it has more to do with the fact that it costs about the same to repair the old one as it does to buy a new one.
Years ago, I bought a couple of rent houses with loud single speed Hayward pumps. I initially tried to find a motor shop to look at them, but was unsuccessful. I tried to repair them myself and found that the insides were totally corroded.. So maybe they could be repaired, maybe not, but I can understand the motor shop's position.
I switched over to three IntelliFlo VS pumps that have been running 24/7 for an average of over 5 years now, without any issues.. Maybe they will all fail tomorrow, or maybe they will last another 10 years. It will be interesting to find out...
Thanks,
Jim R.