You could start a club locally :lol: . Sounds like there could be quite a few of you there. One of my own club members is in Te Puke too.
As Alan said, the NZKA is postal only. Quite a few clubs now send out the majority of their newsletters via email so you could just join the nearest. Haven't got a map handy, umm what's nearest? :roll:
Let's see, clubs in Hawkes Bay, Hamilton, Auckland. One of them would be suitable but you can join any affiliated club nationwide. Makes sense to join the nearest as occasionally you may be able to visit them on meeting night and put a face to names.