Tarmo 5 alternate motor connector/coupler
I have printed adjusted and fit my alternate motor connector. Seems to work great for me. Hopefully this will help others who don't want to use the drill bit depth collar that is suggested in the BOM. You will need 3 x M2.5 X 8mm bolts. I was able to get them from a local hobby shop.
STL's are up on Thingiverse here : Tarmo 5 alternate motor connector
Design is on OnShape if you want to adjust: OnShape - tarmo5 alternate motor connector