Hi! Welcome to YT, I have a yorkie poo (but he came from a pet store before I knew about puppy mills).
I haven't found any reputable yorkie poo breeders that do all the health screenings, so my best suggestion would be to check on petfinder.com
They always have lots of yorkie poodle mixes who need great homes and many are usually young or puppies
Yorkie Poos are very cute! I hope you find the one you're looking for!