Yes, one is:
I was going to do this on my old Trooper since I didn't care about aesthetics at all but on my new Forester, it doesn't feel right so I'm thinking of maybe getting a sheet of Kydex and cutting it to fit + holes using a Dremel.
I like the premise of putting it over those rear side windows because it is out of the way, they serve absolutely no purpose to me, and my windows are tinted so you wouldn't really be able to see it anyways unless the sun was hitting it just right. I want it to store some standard stuff that I want to keep in the car. Stuff I use a lot more than the need tools or recovery gear (I keep that stuff under the rear floor where the OEM spare and tools used to be). With this, I would have plenty of trunk room for trip-specific items. Like if I'm getting groceries, I wouldn't have flashlights, the first aid kit, and all the other stuff I have in the way. Same premise if I'm going fishing or camping. I keep gear sorted into those plastic milk crate things. I have one for warm weather camping, one for cold weather camping, one for fishing from the shore, one for fishing from the boat, etc, etc, etc. So when I'm about to head out the door, I just grab the tote I need for trip. I like to keep my stuff nice and organized. If I can keep the random gear I always keep in the car off the floor of the trunk, it would be a lot easier for me to load and unload before and after trips.
My backseat is not going to cut it. My 95 lbs Doberman is my co-pilot and she has learned that it is a whole lot safer and more comfortable for her to stay in the backseat. The front seat is too small for her. She has also figured out that it is safer for her to lay down against the rear bench when we are offroad.