Thanks Malcom and Wrappy.
I think I have to go to NZ because as far as I know no country other than Sweden will allow me in at the moment. Obvious places like HK and Japan are closed to foreigners. But the TECO office in NZ is probably closed too.
I was told by immigration that a work permit and job offer would be sufficient to allow me back into the country.
I was more wondering what people thought my chances were of getting an extension under these circumstances, or any other ideas?