Here's something to think about before going through all the trouble and time to find the matching counterpart for the back of your television.
We use our television outside a lot. And we have found that the sun's glare makes television viewing almost impossible almost all the time, sun up till sun down. After dark, it's wonderful. But daylight hours, it seems there is always a bright glare on the television screen making the screen absolutely impossible to see.
To solve the problem, we have to move the television around the campsite facing away from the sun. We have quick shades and move them around the site also to keep shaded when sitting outside. We have found the absolute worst position for the television is to have the back of the television against the wall of the camper, facing outward. The best position is to have the television away from the camper, under shade, with the viewing screen facing the camper, so the camper is blocking bright sunlight.
Mounting the television on the side of your camper gives you only 1 position or only 1 place to put the television. Suppose you campsite is on unlevel ground, on a hill, on a slope, or that exact spot where the television mounts is right in front of a tree. What happens when the sun come around that side of the camper and is now in direct sunlight?
We have found, unless it's early morning or evening or night, we have to move the television several times throughout the day to see the screen for all the reasons stated above. I think you will find mounting on one spot to be equally as frustrating and will eventually abandon that concept and keep the television mobile.
If you don't believe me, take your television outside and simply place it beside the outside wall of your house. Try watching it. With bright sunlight, even in shade, you'll have difficulty seeing the screen. Now turn the television around and set it away from the wall about 10 feet, now putting your back to the wall, and I think you'll see what I mean. Place the television in direct sun light (facing any direction), and you won't be able to see an image on the screen at all. Try it, and I think you will abandon the idea of hooking it to the side of the camper pretty fast.