Does this thing exist?

I'm making lanterns and lampshades, and I want to test them, so what I'd like is this: a bare lightbulb on the end of a flex, so you can loop the bulb end over a rafter to hang down like a normal ceiling light and plug the other end into the wall. I seem to remember the builders having one when my home-home was being built back in the late 80s. But the searching I'm doing so far hasn't turned up anything like it. It's either your standard light fixtures or devices that let you plug lightbulbs straight into American sockets (which seem to be mainly sought after by weed-growers).

Anyone seen anything like this? Several lightbulb sockets on the same flex would be even better.