As I am sure you can tell Pete, the North V South is just a friendly thing. I don't mind confessing to having told you to visit a Tauranga shop either!
3/4 of our population lives in Auckland so, as you can imagine, it doesn't leave much for the rest of us. We don't have any fish shops at all where I live (although the local garden centre stocks the basics) and the nearest is 1 1/2 hours away.
I'm sure Bruce will be smug when I confess that - if I had to live in the North Island - I would choose Napier. I am also looking forward to our next trip there in October.