When I do a shop for a specific item, I visit the company's website to see if they have anything posted. Typically, when it's a seasonal, promotional or specialty item, it will be front and center including the date when it's available. When it say something like "not available in all locations," I'll call the store/restaurant and ask if they have it. If, for whatever reason, they don't have what I need to purchase, I would buy the cheapest item just to get a receipt, and report my experience. The MSC is going to be able to check with the client and find out that the item wasn't available at that location, and it's on them for listing the shop in the first place. No point waiting hours or days for the scheduler to get back to you.