Yep, I'm on the hunt as well for extras, as I'm casing out a Kmart just around the corner from me that hasn't recieved them yet. I've found my needed two today and will try to grab more as I find them.
I just have this bad feeling that these won't hang around long simply because of Kmart, who I can't imagine ordering quantities that will risk sitting on their shelves - the cheap, broke ghetto that they are.