My sister is a pilot, and I think she still has one lying around somewhere. I'll see if I can find it, and test it out for BLD (assuming it hasn't been thrown out or lost or anything).
Solution at Nantes: solve below the table. For multiple blind a small plateau below the table was used.
I didn't like it because of the spectator issue. Even the judge had no idea what was going on. maybe next time I put a solved cube between my legs below the table and swap it with the competition cube?