Need help finding a part

I have a simplicity mower and I am trying to find a rebuilt kit for one of the wheel motors the wheel motor part number is 5023091sm, I have looked all over the internet but can't seem to ind one and Im not totally sure what I am looking for either. I would greatly appreciate any help that I can get the only thing I have seem to found is just a new motor just I would like to rebuild mine if i can.

I need the actual part number off the drive. There should be a plate or stamped number on it somewhere. I need the know who makes it and then I should be able to find the kit for it.

Hydro Gear HGM-12P-7172 I think. Verify that is the correct number and call Hydro Gear to get the rebuild kit. 217-728-2581