i just found this controller i didnt know about it
http://www.honda.de/pdf/Honda_Riding_Trainer_Final.pdf its in german
https://www.youtube.com/watch?v=-X0dJvThkng
in france edit: lol sorry its spain not france
https://www.dropbox.com/s/c6ngmn4l4ebi58a/SIMULADOR_Presentacion.pdf
search for google
MOTO HONDA RIDING TRAINER
It's available since 2005. Controller Not purchased seperatly and Not for private use.
Bad Luck. Looks like a Good One to Play GPB :)
aaah ok, just want to share this.
pictures can also be helpfull for building own rig
:)