I've never heard of such a cover and have not seen it, it looks impressive. I bought a mobile inflatable car tent and I will tell you that this is a convenient thing if you travel often or you do not have a garage for example. I also painted the car in this inflatable house. You don't have to worry that the paint will fall somewhere or it will start raining if you do it outside.
If anyone is interested, I ordered it from this website. I've seen such covers on Amazon, but the prices on this site are nice and they specialize in different inflatable items, so this inspired me to trust.