I just got off the phone from a terrific chat with Michael Haussegger (“Pardy” Haussegger's son) and they are making the Parken steam engine again, a run of around 100.
He told me lots of history about his father, the company and how his Dad used to sell them. I have his email address now and will be sending him some info through the day and when I find out more I'll post it up.