1, Kitchenware Store: You can find cases of dough mixing in local kitchenware stores or catering equipment suppliers. Usually, there are various sizes and types of kitchen equipment, including dough mixing boxes.

2. Online shopping platform: Searching for keywords and face-to-face cases on major e-commerce platforms will find many products provided by online merchants. Make sure to choose a reliable seller and check the comments and feedback from other buyers.

3. Kitchenware Exhibition: Participate in local or nearby kitchenware exhibitions. These exhibitions generally have various catering equipment suppliers, where you can buy them.