/cgl/ - Cosplay & EGL

I really hope someone can please help me with this, I'm desperate.

I've been searching for something like the picture for weeks, and I can't find anything like it anywhere. I've tried looking up Aliexpress but all of my searches come up with the same cabochon settings, nothing like this particular type with connectors on the sides.

I found this one by chance yesterday at a bead shop in town, but this was the only fucking one they had, and I combed through their entire mess of a store looking for more. Oh, and they charged me $3 for the thing, which pissed me off but I needed to at least have one that I could show people what I was talking about.

Does anyone know where to find these? Or even what they're called? My google-fu doesn't seem to be as effective as I had hoped. PLEASE, I would be so incredibly grateful for the help!