I have 2 portable popup blinds that are all tore up I was wanting to see how I could cover the frame with a fabric to be waterproof and easy to connect to the frame of both of them
If you're good with sewing. Fabric at https://ripstopbytheroll.com/ I've seen a few guys build DIY teepees/ shelters. Apart from sewing cutting /pattern may be the other trick.
Remember my water proof roof covers? Well that was no sew and have worked on two the latest two years. If the Windows are still in good to fair shape do an over wrap. Cut wall panals that can be tied to frame up under roof cap and tied to other side panels. Just cut a 3 side flap opening over the original window opening of original skin. The pics of cap aren't on this device but I think they are in the DIY section. Heavy duty material 60" wide and On Amazon 8.00 a yard.