ya mean something like this.?
It is a Brother badged by some other name.. GF's daughter needed a ZZ HC and so I started looking .Had the boss and the right size shaft. Plug and play. oh maybe I lost bobbin winding but I have a sidewinder. I haven't measured the shaft, just stole a handwheel off of some Singernhandy and it fit.
She was doing a bra making class.