I've been looking too. try wiialerts.com. they're great, but it doesnt help me much since I can't buy stuff online during work hours and thats when everywhere seems to restock.
Call your local Target, constantly. That's how we found ours because they don't put them out (at least not in our area). They were being kept behind the electronics counter because I guess they're only supposed to sell one per customer. I'll keep my eye out for you.