There was a forum last week, this is made from a mirror frame that she spray painted, she glued or stapled the cork on to the backer board from the mirror , I believe she also did one with a burlap over the cork.
You would be surprised the amount of variety of office storage boxes at office supply stores. Depending on your location, designers are coming out with designer colors, trendy patterns etc..
I would search the internet for "designer office supply storage" and see what's out there.