I work for a window company in Pittsburgh and got an old sash frame and had it cut down to fit into a fixed window hole for the trailer door. The glass will be removed and stowed away when only the fixed screen is used. Will photograph it and post it tomorrow. I am also thinking of getting one as a full length window for the area just to the left of the door standing out side looking at the door but that glass will be fixed. I will add black film for privacy as well as a curtain.
When this is completed, I am actually considering getting a full length vynal screen door made as well. One that I can see out of during the few warm days that winter allows at times.