I didn't notice that Right Stuff has better prices on rotors. Double check with them before returning your CI pieces because it sounds too good to be true.
As for the gaskets, you can either make them or use the '70 up pieces sold by CI and others. The '70 up gaskets are 1/4" larger in diameter. I got lazy and used the '70 up pieces. I used a little silicone to center them before bolting the backing plates on. I think they will work well.
What did you wind up doing with your calipers may I ask?
I'm glad I could be of help - the front brakes were one of the more challenging parts of my resto.
