I've got some brand new sprokets off an '02 GSXR 600 if anyone is interested. They will likely fit most similar Gixers runnin a 525 chain may even give you a bit lower gearing for your 750.
I'm sure they will fit other bikes too, just give your favorite bike shop a call and I'm sure they'll tell ya if these will work for you.
REASONABLE offers on let's say something like $120 OBO to start.
I'm in Victoria, but make the odd trip to Van....