BIG5 I give you props for your insistant use of "Show Spoiler". I haven't played the game yet, I know I know shame on me, so I finally stopped clicking on your spoiler warnings when you mentioned it not being a good idea if I haven't played the game ;-)
OT, either luck into a BlockBuster that still has a copy; which is nigh impossible at this point, or hit up GameStop. Better yet, find somebody to trade with either here or gametradingzone.com