I have an older home with one of those lighted address plaques with the Better Living Thru Electricity emblems on it. The sockets and bulbs have seized. Was hoping to find some of these dual sockets (there are two dual sockets, total 4 small E10 bulbs). I am not finding any, but maybe Im calling them the wrong thing - or they simply do not exist anymore ;^)

Worse case, convert to LED? If I have to go that route, how can I attach old school low volt screw connected to modern LED stuff? Going to push to find the old ones but afrai they might be very specialty. Especially the way they are rivet connected from top. They are actually sort of collectible, with some cool history. Thought they would be easy to obtain (ebay, etc) but not so much.



All thoughts welcome, and appreciated.

That is also called candelabra or miniature. Amazon may have what you need

amazon

They also have the bulbs, I am guessing 12v.
Like a lot of things you can buy a couple dozen for the price of 2. You are paying for the package.
Now that you know what you are looking for Home Depot may have them.