8th gen F-series power window has three of these rollers inside the window motor assembly. 

The most likely reason why the window motor stops working is that these rollers crumble over time. Print three of these with 100% fill (or lots of perimeters) to fix your electric window without having to buy entire window motor assembly.

These may fit to other window motor assemblies as well, but I haven't tested it. Report back if you know what other models use the same window motor assembly.