Originally Posted by number_6
3. buying from a TA in NZ is easiest, or you can get it issued by QF in AKL. It cannot be issued by AA in the US (if you do that, it prices at the ex-US price), however you can have the ticket set up by the AA RTW desk. I don't think AA has an office in NZ (they do in SYD).
AA does have an office in AKL - it is in the same place as QF! With the lack of advance purchase requirement, you could in theory buy the ticket on arrival. However it may be difficult to get into the country (unless on NZ or Oz passport) since immigration will want to have evidence of planned departure.