Before any arrangements are made to get these sea freighted to Australia the local costs of having them unpacked, cleared etc need to be understood. I had some stuff shipped from asia to Melbourne. The total cost to sea freight a crate was about A$200 (from Vietnam). The cost to have someone receive it customs clear it and make it available for pick up was about A$550 and I supplied all the required documentation

Thieves!
If they are shipped to australia and come in in some numbers it could be less expensive to pay duty than to pay EXTORTIONATE charges on multiple shipments.
Sounds like we need an expert! (Not me