CameraEye Answered

I would appreciate any assistance with the following idea. I basically want to duplicate the small VGA viewfinder of my digital camera in a monocle piece for my eye. Would it be possible to hack a LCD viewfinder from one camera (or other device) to input from the VGA cable from the active camera? You can purchase various solutions off of the web, with some monocles in the $3000.00 range! This has to be doable. Anyone? Thanks!