You can get small LED transformers that take 240v down to 12v eBay just need to get 1 with the right amps for the PID, not sure of the top of my head what the PID wattage is, but will check it tonight. As for the enclosure checkout JayCar, the PID is 48 x 48 x 90(deep) but wait until you have all the parts before getting a case. The SSR needs a heat sink too, they don't get incredibly hot, I tested a 25A SSR running for 90min and the heatsink got to max 34degs, without the heatsink I didn't test. I have a heat sink that I can give you anyway.

Hi Paul, that HEX is looking awesome! I've got the settings for the case swap on approve all new members and anyone can join but it still appears to not be letting people join automatically.