In article ,
says...

I used to service automatic doors and most of them use a 90vdc motor
attached to a gearbox for both swinging and sliding door operators. If I
had a bad motor that was beyond simple maintenance, I'd ship it to
Southern Winding Service. The folks there have a lot of expertise when
it comes to rewinding motors of any size. Of course, I had a few spare
motors. ^_^

http://www.southernwinding.com/


It would probably cost several times the cost of the jigsaw to get the
motor rewound.