@dodgedifferent2 machined the caliper adapters and was selling them. I believe he’s now doing them to order. They might have been patterned from a Dr Diff kit, I dunno? These are for LBP axles. He supplied those parts; the end user would source the calipers, rotor, pads, and flexible line. The end user needed to either turn the centering hub on the end of the axles 40 thou so the Mustang rotor would clear the end or open up the rotor 40 thou to clear the axle. I chose opening the rotor up. If the end user does the legwork sourcing the calipers, rotors etc there’s a big savings over buying a kit.