ECN Forum Forums Photo Discussion Forums Electrical Nostalgia Old low volt E10 sockets - supplier or alternative

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.