The original was indeed rallied after it got back to Australia. And it actually won the 1964 BP Rally! Interestingly, a homage/reproduction of the car was built by Aussie VW fans, Ray black, Steve Müller and Bill Moore from the Sydney area and was fitted with replicas of the parts fitted to the original car with repros of the ANARE decals on the doors.
The car was shipped to Germany and shown at Bed Camberg along with a fully restored Type 118 Country Buggy (Australian Built).
Whilst researching the project the trio found Ray McMahon the leader of the Expedition and he help with details on the car. The car was known as The Red Terror. Neither car returned to Australia, as both cars were sold just after Camberg.
I wrote a very in-depth feature on Antarctica 1 in VolksWorld June 2004.