add places for major chain stores

Get the major chains (Home Depot, Lowes, Walmart, Macy's etc) to give you locations for all of their stores and give me the ability to pick Home Depot and/or Lowes for instance as places to buy nails on my shopping list. No matter which Home Depot or Lowes I am in, the shopping list would come up. Maybe the chains would pay you for advertising their stores.