It's absolutely a sick bike - Twalcom and Stefano have been competing with it (in some form) around Europe since 2008. The two premier events that it competed in were the Erzberg Rodeo in Austria
and the Campionato Italiano Motorally in Italy
Stefano also runs the Adventure School - Italy
. (Google translated for your easy reading pleasure
) where you can learn how to ride like he does.
In regard to the bike - most of what you see on it is available in North America via TwalcomUSA.com
. The big engine guard, QD Exhaust, Bitubo cartridge kit and rear shock, replacement chain, sprocket and pinion. Some items are coming such as the replacement front and rear Excel rims with hubs.
The bike probably has ~$10000 worth of stuff on it including some customs items that aren't available for purchase...
(Full disclosure - I run TwalcomUSA.com and F800Riders.org. Please excuse the spam.)