Can't find 1970 Ford Mustang thermostat

Hi. I have 1970 ford mustang with a 351 Cleveland motor. I can’t seem to get the right thermostat as they are not making them anymore. This engine has a bypass valve so therefore I need the right thermostat otherwise the water just runs continuously through the heads. My engine is not cooling down. Can someone help me with this problem please.

Who told you that? Rockauto shows at least 30 listing from various manufacturers. Click on “thermostat”

You are welcome

Would you tell us where you have been looking because it seems AutoZone has them also.

I am from South Africa. Can’t find anything here. Will try and order one from the states. Thanks