Where's the best place to get all 4 Brembo NON-DRILLED rotors?

Check out http://brakeco.com , they are even open for a group buy at times if you can organize one. As a current 3rd Gen RX7 owner, I have benefited from a group buy setup last year. They are on the west coast, L.A. area and also sell brake lines, brake fluid, and cross-drilled, slotted, and various OEM brands.