Most folks use an automotive window motor. Here is a collection of part numbers that various poster's have used over the years: I hope this helps.
Kwikee step motor replacement - 86-95 Taurus LF window motor NAPA BK665-1395, AutoZone Dorman 742-206
Some readers have taken the old motor to the auto wreckers and matched up with a used one.
Ford part E9SB6323394AB ford 87-88 tbird 87-88 cougar 88-93 lincon contenintal
Dorman 742-211 This works with my motor assembly 9504
Replacement step motor at AutoZone. It's a Siemens "Window Lift Motor", part number WL43003.
Autozone. The brand is "Siemens"
The ID tag lists the following numbers:
Just replaced my 25 series Kwikee step motor with a Dorman 742-277 window lift motor for a 1986 Ford Taurus driver side window lift motor. They said the Taurus had a high torqe motor which is why the number ends with 277 meaning high torqe. My steps zip in and out with this motor application. It was a special order item but only took one day for them to get it to my local AutoZone store.
"One Reader reported" Yours may need the Drivers side motor, but in case it's wrong try the Passenger side. Be sure to have your motor in hand when you order your new motor, or a very good photo.
Anyway we are looking at either the Dorman 742-211/Driver side, or the 742-210/ Passenger side.
Fred & Vicki
Richmond Hill, Ga
2000 H.R.Endeavor/Freightliner/330 Cat