If your screen door is like the one on my '77 Excella 500 31' then all you have to do is go to Lowe's or Home Depot and pick up some fiberglass or nylon screen to match the color you have now. You will also need new rubber screening spline which holds the screen in place and a tool that has a wheel on each end. I think the spline is .125" and usually comes in 25' or longer lengths. I chose gray rather than black. It is just standard screen repair materials and is easy to do. Have someone help you lay the new screen over the area you are going to re-screen and carefully cut about 3/4-1" wider than the border area. This will allow the screen to be depressed within the trough by the rubber spline. After you have worked the spline in with the wheeled tool, cut the spline as it ends where you began. Be careful with the tool because it has a habit of cutting the screen if you are not careful. Good luck.
'01 2500hd ext. cab, 8.1 litre gas, 5 sp. Allison auto
3.73 rear end
Mag-Hytec rear diff cover
Amsoil Dual by-pass oil filtration system
Amsoil synthetics all around
265 watt AM Solar, Inc. system