Just had a quick thought, its not in production, but since the LCD screens are in such abundance these days, I wonder how long it will be until people relize they can be put in the mirror bays outside the car, with a little modding you can setup some of those cheap spy cams to act as a digital side mirror, plus it would be hella tight and super original. Here is how my idea would work: Just mod the side mirror bay to mount a screen, add some kind of watersheild and place a mini cam whereever you feel you would get the best view, here are the parts I had in mind:

so for about 99$ u got a screen....

and for about 40$ you got a camera
The cam would be a straight rca connection to the monitor, so just provide the screen with 12v with a slight wiring mod to the car adapter, and conceal the camera, and BOOM! u got a digital side mirror.

Ok, i know it might be a stupid idea, but im tired of my stupid ideas being pattented and sold after I come up with them, so just watch, it will be on the market soon now.