The Yorkshire Terrier Club of America (YTCA) has a number of breeders listed on their website.
http://www.ytca.org/breeder4.html#GA
That is the best place to find a breeder because you know that they are breeding to the Yorkie standard and are following the Club rules. If they don't have puppies, they can also refer you to other reputable Yorkie breeders in your state.