Hi welcome to YT!
Here are a few places on YT you may find a breeder and/or a yorkie for sale/rescue.
* Featured Yorkies for Sale * - YorkieTalk.com Forums - Yorkshire Terrier Community Yorkies For Sale or Wanted - YorkieTalk.com Forums - Yorkshire Terrier Community Yorkie Rescues & New Homes Needed - YorkieTalk.com Forums - Yorkshire Terrier Community Breeder, Vet, & Groomer Reviews - YorkieTalk.com Forums - Yorkshire Terrier Community
Keep in mind this is the internet so while some of these breeders are highly recommended, its still advisable to do your homework. research the breeder you choose and ask many many questions. also go to their home to visit the puppies, parents, and living environment. there is a lot of great information on YT about purchasing a new yorkie so read up!