Shortair,
Have you come across this company,
http://www.flyinn.co.nz/ ? I remember reading something about them on a flying forum here in the states and just came across them again. One of their employees, Peter, has a Tiger Moth and probably has many contacts in the vintage aircraft arena.
Let me know if your experiences are good with them. I may employ one of their 172 to tour around. I'm having a hard time dealing with the fact that if we make the move I will have to give up my Cessna 210. I love her dearly, but bringing a bird to NZ is just a bit beyond comprehension while considering all of the other posessions I have to pack and get organized.
Barret