hey have you found a betta- some good shops in auckland are new pupuke and also hollywood fish farm - as well as the other shops too
i dont know of anyone activley breeding halfmoons in auckland other then some of the ones on trade me (please be careful with some of these breeders - you can private message me for more info if you need)
otherwise in wellington we have a very young spawn 1.5 months old of halfmoons coming up - these range from blue reds through to yellow blue bicolours - but they are very small still and not ready for another good few months.
we ship regular and have a facebook page for sale - (Fish-Garage NZ)