Where can I buy a shade fitter for a lamp shade?

I know- my husband has improvised with a whiskey bottle box cover. It’s in tin. He found one suitable made hole big enough to fit the screw on top, made indentation where the shade wires are supposed to fit and it works like a charm.

Go to your local lamp repair shop.

I found this one that might work: https://amzn.to/2NqNMho

Don't need the harp , need the piece that is on the top opening to put shade on the harp. I've tried everywhere, online, in stores, lamp sellers and parts, it's crazy. Seem to be rarer than diamonds in my backyard. I'll do like Nevena's husband did, improvise. If I ever find them, I'll buy all up n get rich reselling lol. Have a great day, and Thanks.