Does anyone know where I can buy footed fishnet pantyhose size 4x?

I personally don't care for the regular, thick, course, dance fishnet pantyhose. It's a lot like having a steel wool rubbing between your legs, for those of us who have a heavier set.

I have been using fishet pantyhose from Nordstroms. They are much softer and thinner material. Your toes will not slip through the "netting." They do not have a solid foot, but I have found I can still compete all day long in them with out my feet burning from the netting. They go up to an American size 14, but I was still able to get them on comfortably when I was a size 18. They come in taupe and black. The taupe works well if you have a dark spray tan.

http://shop.nordstrom.com/sr?origin=keywordsearch&keyword=fishnet++pantyhose&contextualcategoryid=0

danceshopper.com has a variety of footed fishnet tights as well.