I haven't seen or heard anything about a conversion for the entire F to carbon fiber. There was a SEMA IS-F that had Seibon carbon fiber front fenders and hood (that are now available). There is also a company (see link below, Ventross) that makes a rear CF diffuser, trunk and hood for the F (albeit decently priced, the quality is second to none). There is also CF B and C pillars for the outside (I just ordered some). Hope this helps
http://www.ventross.com/default.html
http://www.ventross.com/default.html