Where can I find these Female connectors?

Nobody at Chrysler ever expected these cars to last more than 10 years, maybe 20 at the outside. Now they are 50 years old plus. IMHO - The heat in the connection that MOST LIKELY causes it to burn is resistance in the metal to metal connection that is 50 years old and never cleaned and greased, or loading that wire with more draw that it was designed to handle (add ons, 120 amp alternators, etc). If you had new connections on a new harness there is no inherent reason for it to heat up so there has to be something else in the system that isn't right.