need window screen

Check with the rv salvage companies like Colaw in MO. There are several around the country.

yes, my TT has a screen like yours. my 5er has the double latch at bottom. we are looking at making something.
DW has us remodeling the 5th now. it looks so good almost done. have got rid of all the dated pink. changed all window coverings, more and more
could not have done it without this site

Met a couple in a campground that had a 5th wheel similar to ours. Their bedroom emergency exit window does not have a screen and ours does. We checked the difference and I found that our window emergency opening lever is on the bottom of the window frame and the window can be propped open without interfering with screen. The other's window and screen have levers on both sides that are mounted in the window frame where the screen would live.

You may be able to make a screen and mount it on the inside of the frame but that would entail removing the screen and replacing it whenever you wanted to open and close the windows.

Assuming these are standard window screens you can go to any big box hardware store (Lowes ect) and buy a kit to make the window screen. Not hard to do if you are minimally handy. If you don't want to make one you should just ask them where you can get one made. They'll probably know, you'll need the exact measurements from the window.

How to make one

Frame Kit

And you'll need a roll of fiberglass screen to finish the job