Has anyone had a go at getting spares directly from Athens (ie,
It's always worth a try.
Some years ago I had some success in "circumventing" the local agent when I needed parts for similar equipment* made in Israel. The factory was also very generous in providing "hard to find" technical information (and drawings - for the identification of parts) as well.
On the other hand, if the course was in Athens, then perhaps it would be worth a go!
* No prizes for guessing which one. I also know a guy who went out to Caesarea for a week to get trained.