Instrument Panel Sockets and Bulbs

They are larger. I think 5/8 instead of 1/2 I have some used if needed, not sure how many.

This is correct. Search for “Mopar 5/8 instrument Cluster sockets” and you will get a bunch of hits. Auto parts stores often have them, you just have to find a guy who knows what they are. I think the 1/2 versions are way more common.