One of my coworkers told me he snagged a 20th OP from the Target in Union City. One of his friends found the last one sitting on the store shelf, needless to say there was a bit of ninja-esque going on (he HID the 20th OP so no one else would find it).
BTW...he's been busy trying to find it (Walmart, TRU's, and Target's all around the East Bay). I guess he got lucky last weekend.