Database with coordinates of all FIRs or Air traffic sectors

Hi there,

a couple months ago I have seen a table/file somewhere within the Opensky Network environment, which included the coordinates of the polygon points of each FIR or ATC sector.
However, I cannot find this data anymore - has this been deleted by any chance or could you please direct me to the right location?

Thank you so much!

Cheers, Tom

Was it looking like this simplification or in more detail?
jaluebbe.github.io/FlightMapEuropeSimple...p_europe_static.html