Hi Chippy,
I use Vpostasia -
http://www.vpostasia.com/ for a number of moderate size parcels I import. Can be used for single items. Although I do not suggest personal importation as there is usually warranty issue to deal with.
If you have warranty issues sorted Vpost has worked well for me. The only thing that can be a bit of a problem is the proceedure. The invoice has to be faxed to them before they locate the parcel and bill you for delivery. Cause a bit of a problem my first time. Really good if your supplier free posts to US address's
Very simple you are given a US based shipping address name and number and address. They bulk deliver all items to Australia then locally distribute.