A continuation of Paul_A's "Water under inlet manifold" .

Did anyone find the right O-Ring that goes on the Stat Housing by the thermostat for the heater pipe. I went through hundreds of them at AutoZone and found one that looks like it, but leaks. I tried finding one the last time I did it, but that broke apart too.

High temp and coolant resistant. I've seen fuel or oil seals, but didn't want those.

Terrible time with this. Thanks!