I don't know if they'd even be interested but the AAAA's (Agricultural Aviation Association of Australia) are a very successful organization with the offices and professional expertise in Canberra to lobby on behalf of the HAA (for a fee of course). I imagine that the time their people could put into it would be commensurate with the amount of financial support coming from the helicopter industry. But their CEO, Phil Hurst is certainly very effective for the AAAA's in Canberra. My thoughts are that if the Helicopter industry were able to pay a staff member to work in the AAAA Canberra office, that might be all that was needed initially, I'm fairly sure they have the space for a desk.
I proposed this as a solution to Rosemarie over a year ago, I think she followed up on it but it never happened so perhaps it's a no-go from the AAAA side.
Ag in Australia is sort of in decline at the moment so I see this as being beneficial to both sides.
Just my two-bobs worth.