Since Quilton stopped manufacturing in NZ, the only 3-ply Quilton toilet paper available has been from Countdown or Fresh Choice for $18.50 for 24 rolls ($0.77/roll).
Amazon.com.au sell the entire range of Quilton, but shipping is usually stupidly expensive.
At the moment it seems to be free on the 45-pack (5 x 9-packs) if you spend $49 (to get free delivery I simply bought 2 packs).
They're AU$24.75, which becomes $25.88 once you add NZ's GST, but even after paying with an NZ credit card with the exchange rate and your bank's foreign exchange fee (2.5% with my Kiwibank visa) it works out to about $28.81/pack or $0.64/roll. The same number of rolls from Countdown or Fresh Choice would cost you $34.69.
I think Wakrak was onto this one a few weeks ago, surprising they have not fixed it yet for this product. A friend was also ordering softdrink(12x1.25L for $15 etc) with free shipping and they sent it, now costs $50+ lol.