I did it!
I bought a 15€ tray for Opel Astra, no need to drill the car or the tray, just removed the metallic ring from the tray holes to allow me to force them a bit. The grey tone of the tray is exactly the same of the one of the car. This is the result:
As you can see in the last picture, my Oakley glasses are a bit too much for the tray, but they are safe anyway.
