Remixed the tray designed by RichardP85D by removing the large center bracket and beefing up the front. The original file was slightly too small for the Model S I used, so I sized it up a few mm, now it is 210.84mm wide and fits snugly in place.

I attached my Tesla Button logo (https://www.thingiverse.com/thing:2630338) with PVC cement as a pull knob instead of using the finger holes.