Not sure as to what you mean by "stand alone" but I read that as you do not want to have to add something for stability. Lots of folks use a flannel backed table cloth. You can get those in large sizes - 60x120 - or maybe even larger.. Also, do not know if you have something equivalent to our Joanns, but we can actually purchase that wide vinyl table cloth material by the yard. I myself use a simple large piece of Warm and Natural batting but I have it just tacked to the wall and I do not take it down or roll it. . It might work for you if you added a small pocket top and bottom and inserted a dowel or thin strip of wood - that would make it easy to roll. They also sell actual pop up portable design walls but those are pricey (imho). Some of my friends use 2 large sheets of Styrofoam covered in flannel and hinged in the middle. While it is a great solution if you have room for it. it is way too big for my space. Good luck - hope this is the type of info you are looking for