Interesting thought, but I kind of think wall markings should be reserved for higher things like the Vietnam memorial and the clandestine services wall (or whatever it's called).Here's what I would do ...
- A wall at the Tesla factory with the names of all the Signature owners, with acknowledgement of the role you all played in getting Model S to the market,
- A framed print sent to you of the wall with your name on it, and,
- A thank-you note, signed by Tesla exec mgmt.
And a bottle of wine, of course.