I have a pair of Baer brackets to mount late model PBR calipers to your 10-bolt BOP rear axle. These were included in a rear 12" Baer brake kit and used only for mockup. I ended up building a Chevy 12 bolt for the car instead (65 GTO) and had to buy a different set of brackets from Baer to mount the calipers. I think the brackets were $125 new, so how about $75? Pics below:
