Technologic80 wrote:
Great Lakes Skipper, eBay. Set up alerts for eBay for the terms "Lewmar Screen".
My last Lewmar (ended up replacing all three with Bomars) hatches, I had a friend make the screens. They were elastic, that stretched around a "lip" on the trim piece. She got the screen from Home Depot, and the rest of the stuff from JoAnns/Michaels, all out I think everything cost $30. If yours are that style, you may have better luck having someone crafty/handy with sewing do it.
I made a sun shade that fits in the screen holder over the winter. I had some left over sunbrella and bought a spool of spring steel online. I copied the sunscreen size with the spring steel and made a circle and sewed the sunbrella around it. Took maybe 30 minutes. Came out great. No more ugly cardboard to keep the sun out.
To make a screen you will probably need a fabric edge. To make it easier sew the fabric edge around the spring steel, then sew the screen on top of it. If you use lightweight fabric you don't need a heavy duty sewing machine.