Have a look at Seawind
Catamarans. Aussie made and hugely popular in the cruising market in QLD. There are plenty of Youtubes on them as well. The AUD is growing every day against the greenback, but not sure how we are performing against you pommies.
You should be able to get any GST that you pay back, also depending on the boat there may even be some export bonuses. If you make it a "business" transaction of course. Our govts are more than happy to see exports go up, so browse the D fat site and you never know what gems you may find. Australian trade policy and news - Australian Department of Foreign Affairs and Trade