Trying to ID this component & where to get a couple of them? Is it a varistor?
Looks like a Bourns MF-R065 resettable fuse, a very old one since I believe the new ones have the "UL Recognized" symbol on them and the logo looks different.

https://www.buerklin.com/en/Products/Electromechanical/Fuses-and-Breaker/Fuses%2C-Resettable-and-PTC-Fuses/FUSE-MF-R065-2/p/51G2384