I live not too far from the accident area. A couple of months ago I stumbled on this thread and decided to go for a look myself.
I walked the entirety of Peates Mountain track and then turned left at the end as described above. From the fire trail, I decided to literally bash my way through the scrub on what looked like an old trail, and spent several hours looking for any wreckage.
It is very rough scrub. So thick that I got lost. I really should have had a machete or something with me.
I did find an area in the middle of the bush that had those streamer things around, but for all I know there could be a completely different reason for them being there.
If there are any remnants of the wreckage there you would need a guide with very precise coordinates to take you to them. I’ll probably have another go later this year if I’m bored, but will be better prepared.