Hi, I'd like to replace this light fixtures for something more modern without spend8ng too much money (hopefully there is a photo attached). Looking behind the shade there is a bulb that is connected to the wall directly, then the shade just covers this. So I'm trying to find a shade that I can screw to the wall to replace this one...hopefully that makes sense! All I can find are light fixtures that have a bulb integral to them. Can you help? Thank you!