Well, the one at MyRoadster.net certainly would make it easy to reach the edge of the screen Obviously you would want to fabricate some sort of an enclosure to protect the area around the LEDs, and that can be as dirty and simple or clean and complex as you want it to be.

For logos, the frosted glass-style stickers work quite well, and you can pick them up at just about any local sign shop. You can use one of their fonts/images, or bring in a vector format font/image and have something custom made up.