Geodreieck?
I was recently in a similar predicament as Simon describes in No “Geodreieck” in the UK?, the ARISTO brand. I have not been able to find the mentioned tool locally, nor at the usual online locations here in the states.
Very surprising.
It actually wasn’t easy to find a German office supplies online store that ships worldwide either. Klammeraffe24.de appears to be the solution. Let’s see how long delivery will take.
Update: They arrived on July 25.