Fanatics has the official 2013 Dallas Stars Draft Cap available for purchase. The NHL shop is still playing catch-up (kinda pathetic, isn't it?)
I recommend you get them now if you want them. I got a feeling these won't last very long. And as far as I know, this is the only place I have seen that has it. Enjoy!
I still have an old Dallas Stars Reebok Center Ice Cap and it's still in pretty good shape. I have to say Reebok makes pretty good caps.