Well it took a while but some detective work finally paid off and we found the Victorian Craterellus species – our local Horn of Plenty or Black Trumpet species, first found by Jonas.
And the host tree matters, although in our case there were none under the actual host trees and we were about to move to another spot when we found this on the edge of the stand of trees more under Blackwood than the host tree we had driven to investigate.
These were in a national park so stayed in situ but hopefully others can be found presuming Ive worked out the trick.