Oh, James, I am so sorry you are having to take this decision. I have taken in lots of goats for people, and please be assured, that goats do settle quickly in their new home, especially if they have their friends, or siblings with them. 8 is a lot for someone to take in, although I have taken 5 together!! Perhaps if you could split them into groups, rehoming would be easier.
I would offer to help, but such a long way from you, and I have 18 goats with this years kids, and more due, so looks a bit like a goat sanctuary already here.
Fingers crossed someone can take all your goats. Thinking of you