I believe they are the only AUS authorised dealers:
http://www.televue.com/engine/page.asp?ID=60#Australia_
Probably why the TV stuff is so expensive, sigh! That's why we need competition.
There are other good barlows around...why just TV? Don't get me wrong...I have a TV 1.25inch 2X Barlow. It's good but there are others just as good.