OK guys here you go!!
https://drive.google.com/file/d/1EJ4...w?usp=drivesdk
You can tell this is the real deal if you back and watch Katraya's eviction from BB9, I believe this is the only time in the show it's played in full!
If anyone else has any other underscores/tracks at all please do share I'd love to get my hands on some!