Here are some asian floats (SF) which you should be able to get in Oz. Read the "Sig Smooth Floats" thread for a lot of good info in one place. Also, check with your local hobby shop to see what he can get for you.
http://horizon.hobbyshopnow.com/pro...sp?prod=SFM3814
Here's a link to an article to tell you how to select them and install them properly on your plane.
http://www.flyinglindy.homestead.com/skisandfloats.html
You're gonna have a lot of fun.