I inherited a floor lamp without a shade. It has a harp, but there is nothing on the top of the harp to attach the shade. If I have my terminology correct, I'm looking for the piece that that the finial will screw into. It's circled in this photo. What's this called, and can I buy one with a finial so I can buy a shade for the lamp? Or should I just buy a new harp (that presumably will come with this piece)?