There is some information here, various threads, that you might find helpful:
Yorkie Rescues & New Homes Needed - YorkieTalk.com Forums - Yorkshire Terrier Community
It's good to hear you've worked to help the girl.
Are you Kentucky or Louisiana? That might help others find someone to help near you. A few photos might perk someone's interest here also.
The threads in the rescue section should have info to help you safe guard the pup in her placement.