After about 20 small test prints to make sure the connections fit, I finally printed the full version of a replacement trash can foot. Unfortunately, while I was away, something went strangely awry with the print, with one part being printed way to the left and other smaller skews happening too. Being on my way to Sotahuuto, I didn't investigate a lot, save to check that the X shaft connector was solidly on. The motors have not previously run hot, I didn't check them here, though. Bummer.
The failed piece:
Part entirely shifted left. Did it come loose, warp up, and get pushed?