Eric,
Why would you want to spend $300+ for OEM rebuilt calipers? The powder-coating is not worth $200 !!!
You can go down to your local AutoZone, or O'Reily's, perhaps Pep Boys and buy quality rebuilt calipers for as little as $50 each and get a lifetime warranty included.
I have bought rebuilt calipers for as little as $20 with a 50K mile warranty.
No, they are not powder-coated but for $300 you could buy calipers and the equipment to powder-coat your own and still have money left over.
...Rich