Most grocery stores don't stock dino ribs or beef plate ribs at the meat counter, but any butcher should be able to special order them for you. The key is you need to ask them to order cut 123A. That is the official item number across the United States. The official product name for cut 123A is Short Plate, Short Ribs, Trimmed. They will generally come with 3 bones. You can also find plate ribs at Costco's business centers or you can order them online from meat retailers like Snake River Farms.