I actually have a set of original two piece rotors but decided to sell them to a restorer and ordered the one piece units through Classic Industries during one of their sales. I knocked the races out that came with them and installed the ones that came with my Timken bearings.
I wound up getting my calipers through Autozone although I had to send the left back because the first one was so messed up. Otherwise, I would've gone through Muskegon Brake for the rebuild. SSBC charges more and I've heard some complaints about their work. You will need to take a bank note out if you want to have Whitepost do them. If your cores are nice, definitely work with someone that will rebuild YOURS and return them to you.
I'm currently trying to talk Hawk Performance into manufacturing (street) performance brake pads. The other alternative is to buy the same year 'Vette pad and radius the ends of the backing plate.