Its a great tool to have! I got mine 2yrs back from Hard Racing
for use with my race bike.
They are a GS911 dealer and have good prices. Make sure to call them to place the order, the online prices can be misleading.
Currently - 2013 Ducati Multistrada GT, 2010 BMW S1000RR (track only)
Previously - '13 BMW F800GS, '13 MV Agusta F3, '04 Royal Enfield 500, '97 Yamaha RX135, '90 Yamaha RD350