My radiator developed a small leak at the thermostat in the top tank of my rad. I took the wire lock off to check it out the gasket was broken causing leak.On examining the thermostat itself the rubber seal on the bottom of it is rotted half off,can you still get these thermostats and who supplies them.The part #is AC-476-4#. can I just seal up the top part and run it this way or a new thermostat must be used. Any ideas Thanks biddaboy :confused: