No i do not specifically have that. But gravies are usually p easy. Id do something like melt some butter in a sauce pan, whisk in flour to consistency until it browns a lil (prob equal parts butter and flour), whisk in guinness and beef stock or bouillon cubes. Throw in some salt and garlic and onion powders maybe a sprinkle of worchestershire. Boil. Whisk every now and then. Gravy will thicken.