There are a few on trademe from sellers of things like the junk austlec powerpoints so I am reluctant to go and buy some off there, but has anyone else bought any of the ones sold as check meters?

Should be able to re-arrange breakers around to stick one on the feeds that go to the flatmates room without too much trouble, but im wondering if there are any other solutions that would fit in a standard breaker board but have some form of connectivity options?