Turns out they don't ship to Australia...

Hmm this looks okay, what do ya'll reckon?
http://telcoantennas.com.au/site/car...enna-connector
http://www.ebay.com.au/itm/Carcomm-P...-/270916914683
Actual car holder/mount may not be as good as the Chinese one suggested by rainisto, but other features are interesting.

I found a bunch of other decent options...
http://www.ebay.com/sch/Mounts-Holde...efLoc=2&_sop=3
http://www.brodit.com/productList.ht...del=N9&pn=prod

Turns out Brodit is far cheaper if one buys from eBay retailers based overseas, instead of via that Australian reseller.
So after ruling them out, they're now back on the short-list, plus there's other interesting options in that eBay search.