I have never brought one that way... economically it does not make much sense because you could probably secure a similar plane here even if imported from US, for less than yours would be worth. Ferrying nearly always seems to cost more than you think and be subject to some kind of big or small complication along the way. At least once its in the box, you can be more or less sure it will arrive on the dock more or less as it was packed, at a time and cost you estimated. Ferrying is much quicker of course and if all goes well, you could be up and running with a new Aus Certificate of Airworthiness (if you are thinking of importing permanently) within a week or three. Alternatively, it could be stuck in some god foresaken hole with a cracked cylinder or some piece of paper a tin pot General does not like or some unforeseen 'charges' no-one envisaged....
Having said that, there are quite a few very experienced and reliable ferry pilots around here who know their trade well and specialise in bringing planes of all sizes and types from all over the world to Australia (not the anywhere any time types - coming here is a bit different to the average Atlantic crossing.) I don't care to recommend anyone in a public forum, but I'm sure there are folks around here who will
. I doubt they would work out cheaper or more predictable than a box though... but if you want the 'thrill' of a lifetime, (even if you don't sit in the plane!) Why not?