Just edited my previous reply adding another idea to get mantenienced your existant sockets.
About your problem… break the bulb, twist and pull out the bulb base with plyers… bulbs are available everywhere. Try to save the socket which is the important here. That’s my advice. I have made it. Easy to do. Good deep cleaning and sandpaper or brush wheel with a dremel
I’d say in most of the cases, the sockets are still useable after a good mantenience. As I mentioned after my edited reply, as far the spring and the round board where points are hold are not broken you are good to go and pretty sure you will be good.
And if they are shot, try the service parts I posted the link from eBay. Several sellers got them, just posted the eBay link for simplicity showing a set for 1157 and 1156 bulbs on one link… sure need 4 for 1157. Maybe your local parts got these at the HELP section.
There is NO NOS sockets. They were pressed into the housing at housings factory, not even at assembly plant. Plant got the tail light housings already made for assembly by the manufacturer, pretty sure a 3rd part contractor under Chrysler supervision.
Those spring hold sockets were tipically used on tail lights being serviced/replaced from trunk with tail lights attached to the body. Not even remove lense to replace, but your car is not. You can’t replace the bulb from back like your 65. Hence why sockets are pressed into the housing and get weatherproof boots.
However the bulb service system from back of the housing (trunk) are tipically bigger diameter to allow the bulb head going throught the tail light hole. The generic replacement I meant is smaller just to fit on existant hole (More less).
(Just noticed you got a link on your thread at the electric board section where I posted some replacement options long time ago)