A friend makes replicas from the MGS01 bodywork. If you want your bike to look like a MGS01, and you have a v11/Centauro/sport11100i or Daytona RS it will fit. Kit are the glassfiber parts needed. That
means you have to make yourself the fairing mounting, frame at the back, a gastank(for under the cover), get an exhaust made.
Headlight can be used from aprilia leonardo, the same Guzzi used for the street mgs01 prototype. For silencer, no drawings, but any shop that is used in doing these things can make something for you.
look here for more pictures:
http://www.guzzipfarrer.at/MGS01.html
http://www.guzzipfarrer.at/chassis-MGS-01.html