I just went looking for one last week at
WalMart. The customer service agent told me that a Super Walmart might have one in store, but I'd probably have to get it online. I couldn't find one at BRU or Target, so I looked for the cheapest online price. Found it at Target.com for cheaper than Wal-Mart (you could ship to store at WalMart for cheaper, but I've heard too many bad experiences about that). It's a pretty big bag, but I'm not sure you could get a Sit and Stand through the drawstring opening. It opens to about 17 inches. HTH.