We have dogs and kids with us in our RV. We would like to get something that is tougher and so the kids don’t poke a hole in the screen but allow us to keep the door open with the AC on. Anyone have any advice?
Have you seen this product?
The easiest thing to do (and what I have mostly seen) is you can measure the size of your screen. Then go down to your favorite home improvement store and have them cut plexiglass for you. For the rounded sections you can cut that with a jig saw and sand it smooth. If you are handy you can easily make it fit the screen door by fit or velcro.
The Lowes/Home Depot route is fairly common. Just measure the size and get it cut, many folks use velcro to attach it to the door frame.