You'll have a pretty hard time getting it registered here - re-read the advice from above nxrsr20 and canuck13. All the information for importing vehicles into Oz can be located on the relevant government websites. If you have a look at them, you'll see you have to jump through a LOT of hoops - it's pretty depressing really (even for a race only bike).
And even if you succeed - it'll be a bit of a lottery as to what eventually ends up on your door as Andy has said above.
I entertained this thought myself, but your much better off just being patient - they are unusual nowdays, but not rare, and come up for sale freqently. I have seen 4 for sale in the last few weeks. Wait, save money, and get the right one.
Regards
Scott