I am replacing the old rubber hoses and am uncertain about the top hose (5" long, 1 1/4" id, 45 degree bend) from the swirl pot to the radiator. Currently there is a flexible (fluted) hose and I am finding it hard to locate a replacement. I guess that the flexible hose is needed to protect the radiator from some engine wobble (technical term!) and replacing with a 45 degree standard hose is a bad idea? Advice welcome, and/or a source for a fluted replacement please! Cheers, Minty