I saw that same scion commercial that you did and had the exact same idea. I was wondering how I could go about doing it in my wrx. The major issue to resolve as I see it is that there needs to be a slot space created above the monitor, which would most likely involve cutting into the dash in your case. It's hard to make something like that look clean and do it in a way that doesn't crack the plastic or make it warp in weird ways. I think the hinge mechanism could be had with a quick trip to the junkyard. A lot of ash trays in cars have a flip up door that works much the same way. You might be able to take it out and extend it to fit a larger plastic plate.
Another option would be to find out the part number for that assembly on the tc and find a way to mold it into your setup.
Good luck, I'll be searching for ways to do this too.