I wouldn't discount ring lights entirely. If you want some modelling simply cover half the ring. The main thing is to get the light between the camera and the subject but not shining into the lens. A ringlight does that. You can make a homemade version with a cheap bundt pan by cutting a hole in one side and pointing a small flash into it. The light will bounce around the shiny insides and out, you can shoot through the hole in the middle, though the hole may have to be enlarged for some lenses. It's a fairly cheap experiment.