Have you done a search for a Yorkie Rescue in your area? I came across these two website, maybe they can point you in the right direction in case they are not able to help.
http://adopt-a-yorkie.1-800-save-a-pet.com/ http://www.dogpages.org.uk/breedt.htm. Too bad you can't keep her. I do hope you can find a good home for her. Good Luck!