If you're interested in buying a cock and ball ring, there are several places you can look:

1. Online retailers: There are many online retailers that specialize in sex toys and accessories, including cock and ball rings. Look for a reputable retailer with positive customer reviews and a wide selection of products.
2. Adult stores: If you prefer to shop in person, you can look for an adult store in your area that sells sex toys and accessories. Many adult stores have knowledgeable staff who can help you choose the right product for your needs.
3. Sex-positive events: If you attend sex-positive events like sex parties or kink festivals, you may be able to find vendors selling cock and ball rings and other sex toys.

When shopping for a cock and ball ring, remember to consider factors like size, material, style, safety, and price. It's important to choose a product that is comfortable, effective, and safe to use. Be sure to read reviews and product descriptions carefully to ensure that you're getting a high-quality product that meets your needs. Additionally, always follow the manufacturer's instructions for use and safety to prevent injury or discomfort.