Congrats, why type of Jukebox is it?
I used an importer of cars from the US in Adelaide to bring over a Diner Booth for me. I think this will be your best bet, share space in a container.
Maybe grab a Deals On Wheels magazine and contact some of the car importers from the US in Sydney. You will just need to get it freighted to their depot and they will take care of the rest.