I just ordered a rear Marchesini for the XR1200 from BellissiMoto.com, they said it could take 8 weeks, not counting the 3 weeks everyone in Italy takes for vacation sometime in August.
It cost me $1476.00. I'm just the opposite of Macdaddy above, I already have the rear Braking wave rotor, but need to buy 2 matching rotors for the front, Or to save some money, I might just re-use the floating X rotors I have installed on the bike now