eBay auction number 233125518398
That is a 0-10v input one, I just picked up a 4-20mA one for same money, there is a few in the USA but shipping plus duty is a killer for me sometimes.
They don't come with the connector, but I have a plan.... Rs components want another £30.... Again cheaper ones in the us as I know you are down under.
This is the SMC one hypertherm use but I am not sure about exactly how it is controlled (I couldn't find a cheap one ... Hence the SMC ITV1050 one
You can just make out the part numbers if you zoom in
https://weldfabulous.com/hypertherm-228 ... -valve-sa/