I got mine from Auto zone. The part is a "dorman" part 85835. 1/2 inch instrument panel socket. Says fits bulb numbers 184, 192, and 194. @3.29 each. I used them to swap out the original holders in the dome light that have the bulb built in to change to LED's.
Here is a link from O'reilly


Dorman Conduct-Tite! 85835 - Instrument Panel Socket | O'Reilly Auto Parts