Need Help Finding a Klixon Thermal Overload

I have a Kenmore refrigerator that I bought new in 1975. It’s kept my beer cold for years.
I need to replace the Klixon Overload Switch. The Klixon number is MRP28GM. It has an FSP[COLOR=“Red”]850841 [/COLOR]number on the side. Does anyone know where I can get one of these?
Thanks

I just checked the Sears Parts site and it shows part number 850842. Can that be used with the 850841 that I removed from the unit?

Thanks

My guess would be that the 841 Klixon is obsolete so they have come up with a kit to replace both it and the start relay.

AP3120015
Click on the above for more info on it.