Recently got the Warhammer 40k: Space Marine Collector's Edition and I customized the edition book. I cut Purity Seal holder out and cleaned up the edges and now I can display it. I actually think it looks pretty good... and better yet I hollowed out the edition fake book so now it is like a neat storage box.
EDIT: (If anyone has the North American cards from this CE and would not mind parting with them for a couple bucks please let me know, the one I got was the UK version I posted in the founds deals section and those cards are crap compared to the NA ones).