It looks like there are a million cases for 10" and bellow, but I can't find what I'm looking for my 13.3"

Before I try to explain in detail what I'm looking for, here is a link to something that should give you an idea.

Amazon.com: Syba Connectland Leather Case

I want it to be a simple "book cover", no sleeve in (edges free). just like the one in the link.
Any Idea if this even exists for a 13.3" tablet?