A handy person from Maryland says:
July 3, 2016
We are missing the sliding screen for one window in our house. It has been like this since we bought the place. Do you sell a replacement screen kit or something to add the screen? The picture is of one of the screens that is still there. They slide in front of a moving storm window.
Tom from SWISCO responded:
July 6, 2016
Hello! We don't sell this exact screen, but we actually just started carrying a new type of flexible screen that I think you may be interested in. You can see more information here.