Yup, most pet shops sell the water bowls that can be attached to the side of the crate. My Delly used to put her feet in it and spill it no matter WHERE I put it, so I taped the metal holder onto the side of the crate :)
They are called coup cups and come in various sizes. They either hook on to the side of the crate or bolt on. Yes, Pets at Home do sell them, look in the bird section. Alternatively, check places like Luxway for the real deal for dogs if you want bigger ones. http://www.luxwaycanine.com