I highly doubt CASA would not recognise a type rating conducted by a NZ company.
The sim doesn't have to be approved by CASA (unless things have changed with Part 61, I don't know. I did my TR pre-part 61), it only has to be approved by an authority that CASA recognises or some words to that affect. In this case, the NZ CAA.
So I don't know if your rumour is very accurate.
From the guys I speak to in Tiger, they're flat out on the 320's.
morno