I know a guy who has a set of originals in his garage in Geelong. Not sure if they are for sale though. I'll ask.
Ok, the easiest way is to buy a set in the US using your VISA card and have them sent to an Oz importer at their US address. eg. Steve Lond. They can put them in their container and bring them in for you. You just have to work out a price
Check your price though coz it may well be cheaper to get a set of custom US billet wheels here.

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1995 Mustang GT - Vert
RHD Conversion, Vortech V2-SQ, 42# injectors, CAPA Chip, 18" BonSpeed Wheels, 3.73 Motive Gears, AutoMeter Gauge Pod, Pedders Springs, Koni Shocks, 13" Cobra Brakes, BBK Shorty Headers
~~ He Who Dies With The Most Toys Wins. But Is Nonetheless Dead ! ~~