Are you the Australian reporter? If yes, invite Digdat0, CyberNate, or Dirtybum to come to Bali. I am pretty sure they can do it and you also have the budget to invite them over
. Don't forget to ask permission from the local government for the coverage from above the crater as otherwise (I believe) you will break the law.
Unlocking the 500m limit is easy. Making the Mavic to go up 2500m+ without losing connection, RTH not kick in when you reached certain height, and have enough juice to hover around for a few minutes around the crater is a different matter.