There is a place called Colliflower hose and fittings in Maryland 301 499 5700 I remember seeing something there they make up hydraulic hoses for equipment they would know if they make it or not don’t hurt to call and ask good luck
You can buy the ends off ebay (looks like a 45 at the radiator and a 90 at the neck) to fit a connecting pipe and two more clamps. It can be painted or stainless exhaust pipe or the aluminum pipe they offer on ebay straight and bent.