Please, try
Petfinder.com: Adopt a pet and help an animal shelter rescue a puppy or kitten.. There are many rescues even puppies and the cost of adoption is generally no more then $400 and that will include the neuter or spay as well as shots. I've seen quite a few Yorkie Poos. Also, PLEASE stay away from a woman in Howell Twp. She breeds Yorkies, Maltipoos, Yorkie Poos, you name it. She is a puppymill operation.