If its the shipping cost from the US that is the issue, you could request a quote from a shipping broker like Price USA (there are others). Haven't used them myself, but I recall several other posts on AHB about people using these services to reduce shipping costs from the US, and for getting products here from vendors who refuse to ship to Aust.
The way it works is the shipping broker orders the product for you in their name and gets it delivered to their warehouse somewhere in the US (and many US vendors offer free shipping within mainland USA - so that makes the shipping free so far). The shipping broker then bundles up your parcel with those of hundreds of other Australian customers (people ordering all sorts of stuff - clothes, frypans, etc); and negotiates a cheap transport deal with a shipping company to get the bulk shipment to Aust. Economies of scale come in to play. The broker charges you a fee, usually based on a percentage of your purchase cost.
Can work out much cheaper, just may take a bit longer to get here.