1157 tail light sockets

Has anyone run into a set of tail light bulb sockets that were so seized they couldn't be used? If so, how did you or how would you go about replacing them?

My brother's '72 Scamp is in need of some type of remedy for this and from what I recall, those sockets are essentially permanent in the housing unless they're drilled out or damaged to a point where they cannot be reused. And unless I haven't been looking hard enough, there are no direct replacements-any ideas??