Most of the major banks offer insurance to customers. One way is to open an account at, say Westpac, take out a 12 month policy, with monthly payments, and cancel it when you leave. It's often much cheaper than what you can get short term. Just don't mention to the bank you are only staying two months. They won't ask.
Nigel in NZ
The mouth of a perfectly contented man is filled with .
-- 2200 BC Egyptian inscription