Congrats on your Marlin. Pictures looked good. Good luck with her. I guess yours is either missing or not in good shape? I think an aftermarket one would be ill fitting an you would be unhappy with it. The material I have is kind of a mesh and feels synthetic, like it has some kind of coating. A canvas shop would know and be able to make/reproduce what was original. If there is a Marlin nearby, they could take some measurements. When zippered up, it should not sag below the hardtop piping and be in the way.