Thought I'd share my journey in case others are keen.
Ordered on sale from B&H Photo - worked out to be NZ$231 (opted to handle the duty/tax declaration myself and never got any charges at customs)
Arrived all good, but of course - we don't typically have doorbells to retrofit onto. I was keen for a 'invisible' wired solution, so bought this transformer from Scott Electrical ($26) and piggy backed off an existing front-door light and installed behind a blank coverplate next to the existing light switch. Used the 24v, didn't use the 'Chime puck'. In theory this transformer is underpowered (8 VA) for the Gen 2 as Google claim to need 10VA for their North American spec) but it works fine given I am not actually powering a physical chime box etc.
Works a charm :-)
