Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3897621.
OK, so this is a remix of my model here: https://www.thingiverse.com/thing:3876646. I've integrated a USB Hub into the tray. This essentially adds 3 more USB ports, which is perfect for me to have 2 working phone chargers (as the car comes with) but also room for my Sentry Mode/Music storage media + 2 Logitech Controllers for Tesla in-car gaming!
The USB Hub to use with this model is the "USB Hub, RSHTECH 4 Port USB 3.0 Ultra Slim Aluminum Data Hub Portable USB Splitter" found here: https://www.amazon.com/gp/product/B07RM322YY/. You will also want a short male-to-female USB extension cable. You won't need more than about 10 inches (25cm), so get the shortest one you can find at least that long.
I designed this model so that the above USB hub slides into an opening in the back of the tray. The source USB lead comes down out of a small opening on the bottom. The USB hub has a front-facing USB port which the normal phone charger can plug right into and the hub's source USB lead can be plugged into the car with a short USB extension.
Perfect!
UPDATE: I've now also included "USB Tray2.stl" which is the same model without the J1772 adapter spot.
UPDATE2: I've now added "Negative Mold for Liners.stl" so you can pour urethane rubber liners for your tray.