On a tip off from a fellow builder I bought a few of these cheap motors for $45 vs $150 for the NPC-2212’s.
I already had my NPC-2212, but thought these would make for good spares, and apart from the extra holes and a longer drive shaft they’re a perfect match.
The NPC-2212 is on the right with the long leads and the cheap OEM motor on the left. Click on the image for more photos.
They can be found here.
Your mileage may vary!