It's always difficult when you face a move of home, but when it involves another country and re-locating a cat, you have to think of what your cat needs as a priority, and I think from the circumstances you outline, that's what you're doing. I would maybe even see if you could visit a CP branch in person to explain the situation, and to see if you're unable to get a resolution in the interim, whether they could oganise a foster for you.
I agree though. Your lovely Boo will have her world turned upside down, which is why it's vital to ensure you get a good safe
place for her, rather than somewhere she may end up abused or unhappy.
Such a sad situation for all of you.