I'm not sure I'd spend that much on an old, European left-hand drive VW camper. Then have to worry about getting it here. Better value for money to buy and restore an Australian-made camper.
Westfalia was purchased outright by Mercedes Benz in 2001, which spelled the end of VW Westfalia campers. Since then, VW have converted their own T4 and T5 campers in the Hanover factory and sold them as the 'VW California'. They are available for sale in Australia (by special order).
In 2008 Mercedes sold off their Westfalia division, and they are now independent again. They have again begun converting VW T5s and Crafters, as well as other vans from Ford, Renault, Opel, Mercedes and Fiat. Their website is
http://www.westfalia-van.de/