I always recommend the Yorkshire Terrier Club of America when looking for a breeder. The YTCA is the breed club for the Yorkie and they set the standard, their breeders use the AKC registry and you will find breeder there who truely are trying to breed for the right reason. Here's a link to the club:
Breeder Listing There are two breeders who live in Wisconson. Please remember these breeders aren't selling dogs to make a living, they are breeding to improve the breed and those dogs who for whatever reason aren't needed in their breeding program are sold as pets. They are looking for the best possible homes for their dogs and sometimes will not do a breeding until they have people on a waiting list. Best of luck, you're a wonderful daughter!