Your best bet it to get a shipping quote from a few online dealers.

You won't pay any import taxes, but you will get slugged 10% GST once
the total amount goes over $500 AUD.  So it may be worthwhile bringing
in 2 shipments spaced a couple of weeks apart.  You'll need to do the
sums.  Once the total cost hits 1,000 AUD you'll be up for an import
license, whose exact cost I can't recall but the last one I had was
around 70 bucks AUD from memory.

Ian