I have seen one with full LCD before but it was one of those clip-on onto your mirror types and it stretches the image from the camera so it looks distorted. You would probably need a kit with a matching camera for that kind of mirrors image to look right. I have not seen a kit.

I bought one of these recently for $99 (gone up since) http://www.amazon.com/Belva-BCMDVR1-.../dp/B00CCFUNSA It has a 4.3" LCD and a dual camera DVR (one camera built in the other from a RCA input).

If I come across it the full one again I'll post the link.