If I could get just the shelter with the solar panel door, that would be great, just transfer the whole thing over and be done with it. I also could go with plan B.
Get a bunch of those nylon wire ties and just strap the whole thing to a pole and be done with it, of course for the occasional having to go out and change a battery or something, might be the answer.
I looked at ASA plastic sheets, and that might work, but I agree if it isn't pvc, I'd have to go with some expensive industrial adhesive and that is a bit over kill