How did they print it then, I wonder?

They had some old German guy with a big beard, and two interns, running some sort of big contraption that looked like a medieval torture instrument, and the interns would run and put letters in a row and then the old guy move a massive letter and in the end out came a bit of paper with source code on it.

I appreciate the subtle sarcasm, I did not consider a printing press as an option!

Where can I buy this printer?

Humbrechthof, Mainz, Germany ofc.

(https://en.wikipedia.org/wiki/Humbrechthof)