You could attach coat hanger wire to flexible tube, or spring for some 4 or 6 gauge aluminum wire so it wouldn't rust. Hot glue or superglue the wire to the hose and the wire will hold the shape you're looking for. I'd probably be even lower tech and silicone the wire, since i have tubes of silicone laying around. You could probably also use rescue tape (waterproof silicone tape) If you completely buried the coat hanger wire in silicone, it wouldn't rust.