Search and Rescue, costs and insurance

Hi Everyone,
Long time no post for me (but plenty of lurking around I assure you) but now things are starting to ramp up in terms of a big walk next year: The Bicentennial National Trail.
This being a very long trail, I can forsee that there is an elevated risk of something going wrong. With that in mind, I figured it might be prudent to invest in some Search and Rescue insurance should something catastrophic happen and I need to be airlifted out of trouble (of course this will be triggered by the use of an EPIRB/PLB).
The problem I'm having is finding a place to get this insurance. Is this insurance attainable or is it provided in another package? My first thoughts are, that this may be included with an Ambulance subscription but I'm having trouble finding definitive information. Does anyone here have any pointers?
Thanks
Long time no post for me (but plenty of lurking around I assure you) but now things are starting to ramp up in terms of a big walk next year: The Bicentennial National Trail.
This being a very long trail, I can forsee that there is an elevated risk of something going wrong. With that in mind, I figured it might be prudent to invest in some Search and Rescue insurance should something catastrophic happen and I need to be airlifted out of trouble (of course this will be triggered by the use of an EPIRB/PLB).
The problem I'm having is finding a place to get this insurance. Is this insurance attainable or is it provided in another package? My first thoughts are, that this may be included with an Ambulance subscription but I'm having trouble finding definitive information. Does anyone here have any pointers?
Thanks