Maybe find a short hose that fits the water pump and another that fits the radiator, then go to a plumbing store and get a copper elbow to connect the 2 hoses. Maybe a street elbow or regular and you can get 45 or 90 bends. A flex hose is not good especially with an aluminum radiator, they can bend the neck from the pressure and generally they look like a patch job when you use them....my opinion anyway.