I realize you are looking for a home for these beautiful kids on your own bust have you considered contacting a reputable rescue group? The pre-screen the homes and make sure that the new parents are reputable and loving. One that I love for rescue is : United Yorkie Rescue.
United Yorkie Rescue - A 501(c)(3) Non-Profit Yorkshire Terrier Rescue Organization
They are nationwide and a wonderful rescue group. ♥