Check out MonoPrice
. Good prices and high quality. They have mounts for every configuration or situation imaginable. Search under both monitor and TV mounts.
Our old trailer had a folding TV shelf which means we had to take it down when traveling. We look high and low for a mount that was easily removable, still held a flat screen, can angle at more than 45 degrees downward (because of the limited viewing angle of our TV), and a thumb screw for quick removal of the TV. No one had anything like this. MonoPrice had it. We still use it in our X20E, it easily clamps onto the shelf above the fridge. Now I don't take the bracket down, but I do remove the TV when traveling.