68 Barracuda Fastback Courtesy/Dome light Sockets

M&H wiring harnesses has them. They are pricey only in shipping and handling as they sell the actual piece very cheaply.

Do yourself a favor and only use LED bulbs in them unless showing at an event. Heat kills them! And make sure your insulator in the pocket of the c-pillar is in tact! If not some double sided sticky tape or 3M body tape will work fine.