I have tails and a 3 piece suit. I recommend if you want either to get them from a tailor in Hong Kong. You can send them your measurements and they will tailor what you want. It is cheaper than getting a crappy off the rack suit in NZ as well. They do lots of tails/3 piece suits for weddings etc.
They also have an excellent turn around time. I had a 3 piece suit with an extra pair of trousers and 5 shirts made in less than 14 hours !!! when I was in Hong Kong.