Dingo, I get my UTs off of ebay. I live in Canada, so shipping isn't too bad. Honestly, I was really lucky to get those UTs....usually they go for ridiculous prices, but I managed to get a hold of some great deals!
I find that working with the seller to find a price to close the auction early really helps. Also, I find that telling the seller to mark off the packages as "gifts" helps me avoid the hefty custom fees.....don't know if that would work in Australia though?