Source: Coombs, R. 1985. "A Down Under land of wonder". The Daily Telegraph, August 24, 23 & 23.
Australia's Wonderland traded until April 24, when the site was redeveloped into a business park. There are plans for the theme park to be resurrected at a site in Western Sydney.
It never evolved into the Aussie Disneyland that was envisioned.
As a bonus, below is a video containing rare footage from opening day in December 1985, plus a short history of the theme park. It was presented as Seven News Flashback Report by Mark Ferguson in 2013 on Seven News.