Australian AC Voltage Sensor Adapter:

[Greebo]

A local one was discussed here:

240VAC to 12VAC Transformers

I use one of these on my emonTX running the 3 phase sketch but don’t have access to a two channel scope to check the actual phase difference between the 240V and 9V sides. If someone can suggest a method of comparing primary and secondary sides with a single channel scope I can certainly give it a go and report the results.

The link to the Jaycar product page was posted by dBC in post #3 just above it.