I’m about to order the v5.0 PCB (from the Github repo) from JLPCB along with the components as best I can find them on DigiKey/Amazon. The MOQ on the PCB is 5 units… so I will build up the 1st one and then (if it works fine) make the remaining 4 available for interested parties in Australia. Taking EOI now 
For reference, I am using the BOM and case from this topic as groundwork, so if this works out, just about all the credit should be going to overeasy and sandblech.
Firmware looks like it is building fine with some help from a few straggling notes scattered around the forums.
PS: Not looking to make any profit…. just want to help fellow Aussie HomeAssistant enthusiasts that struggle to find decent DIY energy measurement hardware/systems in Aus. Will post pricing once I have ordered stuff, but it is looking like it might be around $60 - $70 per unit.