Kohler.com is the most direct way to purchase replacement Kohler parts. They are also available at many home improvement stores, such as Home Depot and Lowe's, and can be purchased on Amazon.com.
Kohler.com offers a product wizard to ease the process of finding the correct replacement part.
Lowe's and Home Depot are a good choice for consumers who wish to buy parts in person, and their associates can locate the correct part easily.
If the replacement part or product is discontinued, it may still be found on Amazon.com. Cheaper used parts can also be found, sometimes for half the price of the new part.