Hey! I'll just post places I see adults for sale. I have no idea if they are great breeders or not (you may have to ask yourself!)
http://www.yorkiecuties.com http://www.dandieyorkies.com/PhotosOfMommies.html http://www.desertroseyorkies.us/adults.html http://bigthicketyorkies.com/Puppies_For_Sale.html
I hope I helped in some type of way. If you think I am going in the right direction in your search I can continue looking for you.