They're not official Misumi's but I believe they'll work for you: [www.cnckits.co.nz]. I picked up some 2040's a few months ago and they even cut them to length before shipping them. They'll also tap the centre hole up to M5 if required. They ship out of Auckland.
There's also a bunch of aluminium extrusion shops in the Lower Hutt, they just don't advertise online.
Edited 1 time(s). Last edit at 12/31/2015 10:59PM by 0x0000.
Once I placed my order I dealt with them via email. I showed him the Ormerod 2 kit on RRP's website to specifically ask if his 2040s would work and they took the time to confirm. They're very helpful, and I had my rails in Wellington the next day.
I had to get some acrylic cut in Lower Hutt and drove by quite a few aluminium extrusion shops on the way. Ullrich Aluminium in particular would probably have Misumi rails, but their website is awful!