Seems like something that @turbo8 could crank out in his sleep.I found a source in Au for a 20mm with studs. It was unfortunately $70aud + $160aud for shipping.
What about delrin spacers?
And as long as we are getting them custom made, how about with a cutout so they can go around the hydraulic connection. This probably does no good if studs need to be replaced, and AHC bracket needs to be shaved.