Check with Customs, you can do a temporay import into Australia by paying a security deposit.
Securities

Securities can also be used for the temporary import of goods. A Customs Officer with the appropriate delegation will decide if the intended use and ownership of the goods satisfies the temporary import requirements. The security may be in the form of cash or a bank guarantee. In some circumstances Customs may accept an undertaking from a suitable client. The security is an amount equal to the duty and taxes that would have been payable at import.
Goods that may be imported under security include any goods that may be accepted under carnet, plus goods owned by tourists or temporary residents, or goods that are coming to Australia to be tested and evaluated or to be used in testing and evaluation.
To import goods using a security you apply using a Form 46 (for goods under Section 162) or Form 46aa (for goods under Section 162A).
Another provision for the temporary import of goods exists for goods that are brought into Australia for repair or alteration, not including industrial processing. This is covered by Schedule Four of the Customs Tariff Act 1995 (by-law 9640055) and goods are entered under a Section 42 security.
For entry under any of these types of securities, copies of normal commercial import documents such as invoices, packing lists, bills of lading or air waybills, quarantine certificates and other documents that verify eligibility should be lodged with the application. Any permits that would normally be required for these goods must also be obtained. If your goods qualify and if an acceptable security or undertaking has been given to Customs we will grant permission for the goods to be delivered. You will also need to lodge a Customs declaration for the goods.