One solution would be for you to buy a yard or so of 1.3 oz/yd silicon nylon and sew one together. Done this way you can have whatever features you wish. There is a kit available from RayWay for the same sort of thing.

If you don't know how to sew, this would be a good learners project. If a backpacker knows how to sew, even in the most rudimentary fashion, she/he can have a lot of great light, inexpensive, custom-made gear. If you can't sew you are dependent on an ever more fashion-oriented industry to provide you with what THEY think you need.