Here is the Yorkshire Terrier Club of America's breeder's list. There are three breeders listed in your area.
http://www.ytca.org/breeder4.html#NV
Were you planning on breeding? If so, you will have a problem buying puppies from a reputable breeder since the YTCA Code of Conduct requires breeders to sell pet puppies with a spay/neuter agreement and limited registration.