Welcome to YT.
Have you looked on PetFinder.com ?
You just put your info on the left hand side and hit enter. I know you said your looking for a Yorkie puppy for your wife but there are so many smaller dogs in shelters, young & older, that need good forever homes.
I'm not trying to preach, just giving you an alternative thought. Good Luck on your search.
And "Thanks" for your service to our country!