Elaine, I'm sorry Mia is so sick and hope she is all better soon! I understand your reasons for wanting another tiny one, I did too, for your same reason. Ruby is tiny and for my 2nd yorkie I wanted another one within a pound or so of her size, Reno is slightly more than that, but still considered a small yorkie at 4 1/2lbs.
I appreciate you exposing this breeder/broker for what she truly is....a disreputable greeder. Hopefully this exposure will encourage her to do the right thing. I wouldn't have taken her back either, with Mia being this sick, she obviously wasn't getting cared for by the greeder!
And, as far as the YTCA breeder....OMG.....her name should be listed here too, that is a crying shame to sell an open font pup and that price should make it a crime!