There is a 2009 owner in Perth that joined the UK Region in 2010, and we know of a few other current owners down under. While a little more strict in the US, some countries will make their motor vehicle records available so you can see where Vipers are registered. The club has the 2011 data for the US, but it doesn't show names or actual addresses - it just narrows it down by the 12,357 US census tracts (but does show the year of the cars registered in that tract).
The Gold Coast is a beautiful area and we bet you really enjoy the drives there! Did you have to convert your car to left-hand drive as many do in Australia? Post a few pics either way, we will bet folks here would love to see it (as would VIPER magazine probably).