Think I found the Koala.

>Pic related

First Article

https://www.theguardian.com/us-news/2018/may/17/alexander-downers-secret-meeting-with-fbi-led-to-trump-russia-inquiry-report

Second Article

https://thehill.com/376858-australian-diplomat-whose-tip-prompted-fbis-russia-probe-has-tie-to-clintons