Martin I not sure if you have looked at this option instead of going down you could go up the double mounting cage you would have to file round the corners and its not a perfect fit, lose the cup holder and move the hazard warning switch ( I moved mine down to where the parking brake is ) ESP switch I've never used so I have to reconnect it, also the mounting plate for the cup holder inside the console will have to be cut so the double din unit will slide in
either up or down its roughly the same a mount of work I only went up because I didn't want to loose the cubby hole below the heater controls