2 of my 4 taillight sockets are rusted. One I am afraid to bend because I think it will crumble, the other I could probably sand down real good. Do you have a link where I can get new ones? Even if it includes the plastic housing.
Just Google "68 Firebird Tail light socket" and you'll get hundreds of hits. And they can be found a local auto parts stores too...they are a pretty universal part. Roughly $3 to $8 each depending on where you buy.
I agree the metal ones like shown above would be a better choice for functionality, if being perfectly original is not critical.