Hey dude, I live in Wellington, and before I changed to clipless I used a set of MKS Sylvan pedals and toeclips with great success for work (I'm a courier).

The cheapest you can get Sylvans in NZ is from Bicycle : http://bicycle.co.nz/index.php/parts...ks-pedals.html

Add some el-cheapo toe clips (make sure to get the right size!) and double straps if you can afford them. As far as I can see the problem with your current pedals is that you don't really have anything to stand on, and the Sylvans aren't a huge amount better. Maybe getting some GR-9's from overseas and then buying the rest locally would be a good idea. I'm sure you could sell your current pedals for more than you'd need to spend.

Oh and for what it's worth, Benscycles is awesome about posting to NZ.