Thanks for your reply @SnowStormDA. There do seem to be a lot of these adapters available that have US plugs, which is great if you live in the US ;)
Also, that's only 1000mA; I've heard that the pod doesn't strictly need the full 2.5A it suggests, but 1000mA is definitely on the low side.
I do have a couple of alternative adapters on the way, I was really just interested in getting a proper NZ/AU blade for this.