There is also a guy that sells the brackets on E-bay for the Eldo caliper/Mk VII rotor (may be same as the Master Power setup --not sure). I think the two brackets & (6) bolts/nuts from the E-bay offering is ~$85 dollars. Shipping is another $9 dollars.The big difference between the kit I have and the E-bay one is that you aren't required to buy a set of specialty parking brake cables to work with the parking brake lever on the back of the caliper. The Mk VII conversion was designed to use the existing drum brake cables already on your car, so you have no extra expenses there.
To have this feature with the E-bay setup, you'll have to fork over another $90 dollars.
Another big difference is the Mk VII conversion has provisions of utilizing the Mk VII's stock splash shields to protect the rotors and brake hardware and it just has a more professional look to it when the splash shield is installed. The E-bay rear disc swap has no splash shields or provisions for using any.
The Mk VII disc conversion bracket kit I have is $90. For that you get: (6) brackets (3 per side), all the necessary SAE grade-8 bolts, nuts, washers, 10.9 rating metric bolts, washers, spacers, installation instructions, and this price also includes the cost of shipping within the Continental U.S.