Perhaps contact the company directly and ask them if it's still available, it's the best and most direct route to finding the bag.
Good Luck.
I have not seached long. So far finding it 5 times it was sold by http://www.anthropologie.com/anthro...g&siteID=QFGLnEolOWg-VpbvY6XaJvyWFSqNuSyygA#/