Got the motor out! It was a struggle to get it up on the bench, but my guts didn't bust out, so I think I managed. My workbench hasn't had such an important job till now, so I figured it should get a big clean. I have a big aversion to pegboard, it's promise of modular storage seems to always fall into a mish mash of "i think this goes here" and you end up with a vertical junk drawer. I'm going to rip that shit down as soon as I have someone to take it away.
Now I think I'm ready to dig in and see if I can fix this, or if I'll be trying to source a motor.