Rob,
Here are some #'s for you:
Villa Park - 630-832-1936
West Chicago- 630-231-6322
Aurora- 888-899-4113
Lombard- 630-495-3132
If you are not successful at any of these let me know because a friend of mine used to be a mechanic at Suburban and installed the Z06 caliper's, pads and rotors on a buddies C5 and i believe he kept the parts but he may have sold them...
Justin