I just go to the biggest liquor shop within a few km's of where I live in Auckland mate but for some strange reason yesterday their stock was looking sadly depleted :)
I usually pay $15.99 but I did a net search for ya and you can get it for $13.99, actually $26.99 for 2 = $13.50 each. Hmmm... I guess you have to order by the case lot to make delivery per bottle reasonable, that's a bit sad isn't it :D
http://www.topshelfliquor.co.nz/esto...x#.WqeC5kxuKzk