Does anyone know a suitable replacement tubing for the coolant tube that runs from the thermostat housing to the overflow tank on my 1983 Shadow 750? The tube has a 7mm ID, a length of about three feet and must be extremely pliable. It is no longer offered as a replacement part by Honda and I tried all the motorcycle shops AND industrial hose supply shops in the area with no luck. Because of the heat and pressure the tube must sustain I was cautioned during my searching to use the correct tubing. I was warned of the prospect of having scalding coolant spraying on my crotch region as I rode remarkably fast. Please advise. Thanks in advance.