Step 1) Get to know these health problems:
Step 2) Research these recommended breeding protocols:
Step 3) Pick your breeder:
If you don't want to attend shows, look up Cavalier clubs such as the Cavaliers of Puget Sound. There are usually clubs in every state and most club sites will have a list of breeders, although this still is no guarantee the breeder is a Code of Ethics one. That is up to YOU to research. Email and call these people, ask questions, expect to be asked questions in return, and visit their homes if you can. Many might require you to visit before considering selling you a puppy.
Here are some good questions to ask:
Step 4) Your new puppy is home, HAVE FUN!
Enroll in puppy class, socialize him, and enjoy being owned by your Cavalier. At this point you will have a great relationship with your breeder. Use this person as one of your main points of contact for all additional questions you may have throughout your Cavalier's life. Most breeders appreciate the occasional email with photo updates on how your puppy is doing too!