Where to source new connector for turn signal/ignition switches

Chrysler called those 'Pin" terminals. see Electrical Wiring (Session 247) from the Master Technician's Service Conference
@RedFish posted the connector half comes with the new ignition switch.
Repop steering column electrical connector.

You could try a wanted post for '74 Steering column connector.
It would definately be worth looking in the parts book for a part number, and then seeing what other years and models used the same.
Some (all?) of those connectors have two different diameter pin terminals in them.
Pre '70 columns don't have the ignition switch so they are definately different.

It's possible the terminals are the same as the Ford Wedgelock.
Look at the drawings here;
Automotive Electrical Connectors