Brett,
LG had a Wilwood SL6 set up for the C5 that a few C4 guys converted over and used. They were running the C4 to C5 adaptor brackets and the Wilwood Caliper. The LG set up utilized the stock C5 rotor so you could just purchase any "Stock" style 2 piece rotors and that should achieve the look you are going for. The Wilwood site shows the calipers in red and black so you may have a choice. I looked on LG's site and did not see the kit, it may be discontinued but I know it fit behind the GM stock C5 Z06 wheels and GM A-Molds. The only reason I stayed away from this set up was I had heard under hard conditions the pistons in the SL series of caliper had seized causing extreme pad wear and possible loss of braking. I have never seen it or even met anyone that had but I was skeptical so I went the route that I knew worked. Another option is the Wilwood?s from
DRM for the C4; I am running this set up with absolutely no problems and the rotors are nice and thick along with the pads. Just my .02 but I feel a thicker rotor is better than a larger diameter one. Stop Tech also makes a nice set up but I believe it is the front only for the C4.
Daniel