This would surely be easy enough: someone who is 1) disgusted with the situation on Manus Island, and 2) has deepish pockets, or 3) some organisation willing to start a crowdfunding campaign for it, could run the ad below or something like it, as a half-pager in The Guardian, The New York Times and other august publications.

The wording could change, the email addresses responses are directed to, etc. But the message would need to be kept short and sharp. Social media reinforcement would follow the initial ad.