Hi,
visit the website of the NZ Society of Physiotherapists: NZSP -New Zealand Society of Physiotherapists Inc.
If you open the "news/ calendar" site, click on "professional development calendar" and you find a list of courses for the year.
Maybe you'll find something of interest there.
Be aware, that in order to be able to participate in postgrad study in NZ, you need to register as a Physiotherapist with the Physioboard under the "Special Purpose Scope- Postgraduate Student" category.The Physiotherapy Board of New Zealand > Registration

Regards,
Fyzzio