We get the occassional pregnant cat or momma with young kittens in tow, too. It's disgusting that people won't take responsibility for their pets and have a little surgery done. All our Kidz are spayed/neutered except for five kittens who were born two weeks after their mother arrived. They're almost old enough, though, and will be scheduled for surgery soon.
We keep our vet busy. LOL!
I sincerely wish you all the best of luck in finding good homes for your girls. They're gorgeous cats and I'd think they'd be relatively easy to place. Unless there's simply no one looking for a new cat to take part in their lives.
It's sad you can't take them with you.
Tuesday morning kitty bump!