There's a guy called Xue Nai Yin in Auckland who teaches Wu style. Perhaps that's who you're looking for?
The Chinese government apparently gave him a "Grand Master" title, though I'm not sure how much the Chinese government knows about martial arts!
His approach seems very much tournament based rather than traditional tai chi chuan.
I once pushed him over at a public demonstration. Shortly afterwards, an article (apparently written by a relative of Xue) appeared in the local Chinese newspaper describing the situation and boasting that he'd won.
His publicity materials say he's challeneged and beaten all the tai chi masters in New Zealand, but when I mentioned a couple of very prominent ones to him he hadn't even heard of them and had no interest in meeting them.