If you're looking for old kitchen cabinets, the best place to start is by checking with your local salvage or antique stores. These places typically have a wide selection of cabinets in various styles and condition. You may also be able to find old cabinets on websites like Craigslist or eBay. Another option is to contact a cabinet maker who specializes in creating custom cabinetry. They may be able to help you find the perfect set of old cabinets for your kitchen.