I was at a boy scout committee meeting and a troop had some old gear they were throwing out. This was in a bag along with the top cover. It is missing all the bottom legs but I can make those easy enough. Looks like its just your ordinary older sun shade, however, I'm missing one of the corners. Its skewed at an angle, so a normal 90 degree 3 outlet fitting won't work. I went to home depot and Ace Hardware and none of them have an angled corner adapter like I need. I did find a metal one, but it was for 1 inch pipe and this is 3/4 inch. Could adapt it, but still, would rather have an original piece. No idea how old this is.
I was thinking I could use my bandsaw and cut a chunk of wood out that would work, but would rather not do that.