I
think the only place you can get them outside Europe is from OPT in California (
www.optcorp.com). They are hideously expensive, starting at about US$8000 and going up to about $21000 for the OTA only.
Kick in one of their unequaled DD mounts and you are looking at another US$18000.
One may as well fly to Austria and bring one back. You'd be eligible for a 17.5% VAT refund which might just cover Australian import duty, freight and tax.
I saw one in action in the UK about 3 years ago.
Dribble.
Good luck with your search!