I had to deal with this problem (the monitor) a while ago. What I found is that Flexview is now owned by Jensen. See
http://www.jensenrvdirect.com/products/camera-systems/monitors.html for a list of their current offerings. My monitor had constant lines and the entire picture faded in and out, so I replaced the drop down display with the newer AOM713 listed on Jensen's site. I found one brand new on ebay for a little over $100. Unfortunately, the wiring harness on the new unit comes out the bottom instead of the top like the old unit. I had to open the case (no big deal) and cut the plastic housing so I could run the cables out the top, which I then siliconed in place.
As for the camera, that is a different story. I am in the process of replacing that as we speak. From what I understand, my original camera was basically an off the shelf unit with some SW to reverse the image. Beaver Coach sales does sell replacements, but hold on to your seat when they give you the price. They actually referred my to Motion Analysis who sells them at a slightly reduced price - but still over $400.00. I am 99% sure the camera was actually made by a company called videology. They do have replacement units model 20D739S-1 which you can google for price. Expect less than $200, without the lens - which should be transplantable from the old camera to the new if you want to go that route. You can buy new lenses with auto-iris, etc, but that will add $150 or so to the cost. The only issue I see with this camera is that it does not have the reversing SW built in. For me that shouldn't matter as my new display supposedly has a reversing function built in.
In the meantime I took the old camera apart and cleaned all the contacts. I will see if that makes any difference, but if not - I'll be ordering one of the 20D739S-1 units in the next week or so.
J