Go to
www.ytca.org; breeders referral listing page. These are the breeder members of the National Yorkshire Terrier Club of USA.
With Harrisburgh Pa, you are not too far from New York right? Hamburgh NY is having a dog show 2wks or so from now. Go to the dog show and meet some Yorkie breeders who will be exhibiting there.
Here is the link
MB-F Show # 2005 Kennel Club Of Buffalo, Inc. - Friday January 13, 2012 The judging schedule should be up next Wednesday which will give you the ring # and the time the Yorkshire Terriers are scheduled to be shown.
Also Harrisburg has some pretty big shows, you can find out dates and times by going to the above website.
Many dog shows are free to enter for the public. It is a very good way not only to meet the breeders but to actually see some of their dogs.