turns out, Bedifol = schutzfolien24.de
The contact i had phoned with yesterday missunderstood my request or i misunderstood his answer, anyway, they can customize those Brotect AirGlass.

They propose to send in a Jolla C to them for correct measurement.
And it sounds like they would sell them to normal conditions and prices, no group buy necessary.
So i will get back to the matter as soon as i have correct measures or a Jolla C at hand.