I'm luck enough to be heading off to New Zealand towards the end of Feb and am taking my road bike. Does anyone know of the best way to insure it?

The bike is worth £2500 and I'm going for 7weeks, all the sites I have been able to find seem to do a maximum of 45days worldwide travel. The main thing I want to insure against is it getting nicked really.

Any help would be much appreciated,

Jamie