I have these for the ff motors. One is like the old BWA bracket ie short and the other is slightly longer with a 1mm offset.
After getting a bunch made I sold a lot to a dealer in the UK and then more to a guy in Aussie.
They are made of panel steel which solders well, not as nice as brass but there was an issue with the laser cutter.
There are few left in my stash before I re order....$US3.50 per piece
The holes are for a 3/16 oilite and an M2 motor screw both of which I can supply for a bit more.