This is where things can get a bit funny......
Most non high production items that use electric motors use motors meant for a high production application. I.E, Kwikee steps model 860 used a drivers side power window motor out of a 1996 Ford Taurus. My Yardworks snowblower has a powered remote controlled chute that uses a rear passenger window motor out of a 1999 Chevy Lumina.
If I were you I'd take the motor out and search it for serial number, model number, HZ, amps, volts etc and post what you find online. You may get lucky and find that the motor is out of a dryer.
BTW it is worthwhile to find this out as Yardworks wanted me to spend $376.00 + taxes for a motor that cost me $27.00 at Carquest with core return. All I had to do was tap two of the mounting holes for bolts in the new motor, (10 minutes of my time).
As for electric motor rebuilders; any competent alternator/starter rebuilder in your area MAY be able to help.