hou_ge2000,
The early 80's GSX1100S Katana, one of Hans Muth's most pleasing designs, was immensely popular, especially here in Oz.
There were thousands of "Space Bikes" running around down under.
I'd try to contact motorcycle owners clubs that specialize in Suzuki bikes - maybe speak to a Suzuki dealership - often sales reps and mechanics who work there will know where the closest Katana would be.
Also, try searching the web for "Suzuki Katana", "GSZ1100S", "Katana" etc etc etc...........there must be some links that will get you where you want to go.
Cheers,
LeeTree