Mine is the same, to the left of the drivers seat is just blank wall. So I hung up one of these. It's not perfect but my sunglasses hang on the edge of it just fine. The top one has pencils, lotion, misc small items. I also tend to throw my wallet in there while I drive, and things like house keys that I don't need when we're out on the road. The bottom two have pads of paper and clipboards, maps, etc in them.
Amazon.com: FILE,WALL,3POCKET SET,CR: Office Products
The one I got was smoke colored. I got it at a local office max type of store.