I have one of these 8ft. by 4ft. vinyl banners that were recalled from theaters after the events of 9/11. Most of you have probably seen it. (A reflection of the Twin Towers can be seen in Spider-Man's eye.) But I was wondering if anyone knows of ways to distinguish these from replicas and determine its authenticity? Are there even replicas of the banners out there? I've seen plenty of the movie poster replicas but I rarely see one of these banners at all (authentic or not.) Any advice would be greatly appreciated.