Leak detector (Australia)

[grzx]

Hi, Setting up 700 litre aquarium in Australia and trying to avoid problems with potential leaks in the future. I found a device called Hydrocheck Waterwatcher leak detector alarm in the US.
This is exactly what I'm looking for to shut of my submersible pump in case of a canister leak, however I can not find anything in Australia (AU plug)
Does anyone know of one?