First of all, I suggest you avoid internet searches for a yorkie. The internet is flooded with bad breeders!
Best place to start looking is on the YTCA website.
Yorkshire Terrier Dog Breeders- Yorkie Puppies
BUT, even there, you should carefully review the breeders. There is a disclaimer on the website advising you of that. I would ask for references...speak with people who have purchased pups from the breeder. And, always when buying a puppy, see where the puppy is living and see the parents. NEVER meet someone to purchase a puppy.
There are SO many horrible breeders in Texas....there are good ones, but trust me when I tell you there are way more bad than good.