Douglas Preston Christmass - Doug Christmass Memorial Grove

I stumbled upon a reference to the "Doug Christmass Memorial Grove" on the internet.

Here is a link:

http://monumentaustralia.org.au/themes/culture/social/display/99635...

There is mention on the web page to 58 engraved plaques being part of the memorial.

Has anyone heard of this memorial and the big question is " Are there any photographs of the plaques in circulation"?