I actually will probably not be making much from this film for public consumption.
The cases look a lot like the town crier boxes in my town.
Why would you when the chances are some ***** will just try to eBayng you for your efforts?
Here is a site with a couple pics of the new props. I particularly like the "I will not tell lies" parchment and special quill.
http://www.gryffindorgazette.com/2007/06/20/actual-order-of-the-phoenix-movie-props/
That or the one you've seen is a fake!