After testing the newly-arrived motor at Cambridge Hackspace, it was clear we needed a mount to keep the thing from skittering around the table every time we connected it.
Given the motor's commodity status in the DIY world, I was confident I could find one that I could 3D print on Thingiverse.
It did not disappoint.
The simple mount below also fit the bill. I downloaded the .stl file.
I also downloaded this chunky motor mount, below.