Here are two US companies that may have what you're searching:

Performance Bicycle. Go to http://www.performancebicycle.com. I believe they sell kevlar liners, along with many other gadgets and products.

They should be able to ship to your part of the world.

Also, there is Bike Nashbar, at http://www.bikenashbar.com, who have similar products, with enough variety to make them worth checking out as well.

Use a credit card and there is no need to make currency conversions... Your statement will arrive showing what you spent in AUS $. (The internet is a wond'rous thing, n'est ce pas?)