Off the top of my head three are a few places that do this: REI, Norse Projects, End Clothing, Mr. Porter, adidas, and a few others. It should be more common th

Off the top of my head three are a few places that do this: REI, Norse Projects, End Clothing, Mr. Porter, adidas, and a few others. It should be more common though. I wonder if it used to be harder to know at search time if you were OOS on a particular UPC.