Maybe this has been done before, but here is my solution:
Since the grille has a slight curve to it, I mounted neoprene washers between the RAM tough track and the grille at the outermost bolts. Deadens any vibration and keeps the part from deforming when the screws are tightened down. This grille already has some decent vibration and sound deadening features. I had wanted to mount an iPad from it as well, but that would likely be asking too much from the grille.
Since the grille has a slight curve to it, I mounted neoprene washers between the RAM tough track and the grille at the outermost bolts. Deadens any vibration and keeps the part from deforming when the screws are tightened down. This grille already has some decent vibration and sound deadening features. I had wanted to mount an iPad from it as well, but that would likely be asking too much from the grille.