Black Country Metalworks, Wayfair.com and ATGStores.com sell lion door knockers in a variety of sizes and materials. Other vendors of lion door knockers include Home Depot and Rejuvenation.
As of 2015, Home Depot sells a solid brass lion door knocker designed by Michael Healy. This highly polished knocker fits doors up to 3 inches thick and comes with mounting hardware.
Black Country Metalworks sells several styles of lion door knockers. One popular model is the Dorchester Lion, which features a humanized face and a heavy, tapered knocker. Another option is the Windsor Lion, an extra-large knocker that weighs more than 6 pounds. This model is available in brass and polished chrome finishes.