For anyone who's interested, after quite some time researching and sending off enquiries to companies in NZ, Aus, the US & UK, I found these guys.
DM Electronics
They are the Aussie reseller of the
Headset Inc ANR Kit -
Reviewed by
FLYER magazine as equalling or surpassing the standards set by market leading ANR headsets like Bose and DC.........
By far and away the most competitive in terms of product offered (Headset Inc) and they don't fleece you on shipping to NZ ether, which is nice!
Speak to Darin McLean.