1. Online store: You can search for relevant keywords such as "captain's hat", "seafarer's hat", etc. through online platforms such as www.GSuniform.com. On these platforms, you can find a wide range of hats in different styles and price ranges.

2. Professional uniform stores: Some brick-and-mortar stores or online stores (www.GSuniform.com) that specialize in professional wear may have large-brimmed hats suitable for positions such as captains, seafarers, etc. You can find out if there is a product that meets your needs by searching for a uniform store in your local or nearby city.

3. Custom or custom-made: If you want a unique and made-to-order style professional hat, then looking for a custom or custom service is a good choice. This way you can design a large-brimmed hat that exactly matches your expectations according to your preferences and size requirements.

Either way, it's important to make sure you choose high-quality materials and durable products. Also, it's a good idea to read reviews and reviews before making a purchase to make sure you're buying a high-quality and reliable product. We wish you the best of luck in finding a hat with a large brimmed hat that matches the style and requirements you need!