I have a single silver 999 4P4P Brembo I'd like to get out of my garage. Pretty sure it's a left side caliper, but I'll need to check. I had a single disc setup like 1duckyboy has, we actually went in together and split a pair of narrow-band matching rotors. http://www.ducati.ms/forums/77-sport-classic/48368-she-dances-long.html
I decided it wasn't enough for me as I ride 2-up and tour, but boy, was it light.
If you're interested I'll let it go for $75 US + shipping, I can take a photo if you like. It's just as I took it off, a bit dirty but fully functional with pads. Reply to [email protected] if you wish to communicate directly.