Corbin Seats have an agreement that they will not sell new seats direct to us in Australia, you have to deal with VPW Australia, in Melbourne,
the guy to speak to is Ian Walker,
I have had a couple of Corbin Seats, personally I prefer the "Close" version which is designed for people who like to sit closer to the tank, the standard version doesn't suport my butt enough and allows me to slide back when I take off quick.
I rode from Peth to Bathurst then down to Phillip Island and back to W.A. a couple of years ago and found that after I broke it in it was quite comfortable