2K Outback rear wiper motor brushes

[brokenoutback]

Has anyone done and can give advice on replacing the carbon brushes in a rear wiper motor? I have disassembled the motor and it still spins when disassembled and powered. One brush was worn all the way down (and popped out after opening it up) and the other seemed ok. 

Seems like I can pick up carbon brushes for other tools (I.e. grinders) at the hardware store but it might take some work to get them sized for the wiper motor.

Any thoughts aside from buying a new motor?

Thanks!

Edited November 19, 2018 by brokenoutback
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[3Pin]

I just swap in a new (used) assembly.  They are cheap and available.