Due to the original brackets disintegrating during removal, I designed and printed this mount using stainless tube 8mm OD and an M8 threaded bolt cutoff to make the locating pin by spinning it in a drill used as a makeshift lathe.

It's printed in Eryone Carbon Fibre reinforced PETG at Draft 0.2mm with 98% infill.

I also employed a Line Direction value of "[0,225,90,315,180,45,270,135]" for the Lines Infill and Top and Bottom Layers to ensure they are fully integrated at maximum strength and homogeneity.

The M6 bolt hole stainless steel liner is made from some old 0.5mm walled 8mm OD tube I had lying around.

The design is not handed and can be used to make mounts for left or right handed parts for the front or rear braking system, based on how the locator pin if fixed. If you leave the thread on most of the bolt cutoff used to make the pin, you can screw it into the hole and secure it with a little superglue.