Answer: -Depends a lot on what toilet you're talking about. Home Depot sells some replacement parts for the toilets they sell. If you're looking for parts for the high-end one piece toilets, I could point you to a wholesaler in San Diego that specializes in all kinds of plumbing repair parts. I'm sure they could ship you the necessary parts -Call Kohler customer service: 1-888-361-8000. Don't sweat the prices. You want the parts to work right, don't you? -Home Depot can order almost any Kohler part for you. Had them order a potty seat for me. Came in two weeks and was a perfect color match. Most expensive potty seat I ever bought though; Kohler's fault, not HD's. Kohler's potties are all designer styles with unique colors; haven't heard of third party suppliers.