I forgot to post the link to the YTCA website. They have a breeder contact list. There are about ten in NC on the list. They can also refer you to other reputable show breeders who may have pet quality puppies available.
Yorkshire Terrier Club of America
Dogs shows are also a great way to meet breeders and learn more about the breed. There are a couple of all breed shows coming up in Raleigh in the next couple of months.
InfoDog AKC Dog Show Information - Main Menu