OP if you are still looking, I would suggest doing a search on Petfinder. I would be extremely careful about looking at online classifieds...often the pups are not in great shape and have multiple issues. If you do opt to look there, be sure to fully check the person out...find out who their vet is and ask to see vet records for the pup they are selling or rehoming.
You could also look at
Welcome to Yorkie911 Rescue, Inc. They are in NY.
Good luck in your search!