This isn't what you asked for, but it might be worth considering. I just a week ago picked up a cute case, designed for a 13" laptop, to carry my planner for all my medical appointments, a pen or two, AND my kindle. I think it's cool looking. My kindle is in it's own light weight case. The documents would stay in this Briefcase while I lift the Kindle to reading position.
http://smile.amazon.com/gp/product/B...ilpage_o02_s00
Of course, you can then choose the mini-briefcase that you like.
bgDeb