I have two plastic overlays from a AMC dealership, cool for you jeep guys too! Needs some cleaning, they have a clear coat that's pealing on a couple of them (have 4 keeping 2)
But it comes off easily and isn't terribly noticeable when it's pealed off. I'm guessing 4ftx4ft. They are dirty in these pics and haven't been cleaned at all

You will just get the plastic from the sign not the entire frame. 50 bucks