Faceting instructions for radiant cut

Hi folks,

With so many facetors on the list, I thought I’d pose a question on
behalf of one of my stone suppliers. He’s looked everywhere for
faceting instructions for a decent version of the radiant cut -
preferably as close to the original 1977 radiant as possible - but
to no avail. I’ve also looked and can’t find any. He does already
sell a version of the radiant which I really love, but he’s looking
for something more authentic.

Does anyone have such instructions or know where we could get them
from? I’ve looked through Jeff Graham’s published designs and can’t
find one on his site. The closest I found was a rectangular princess
cut, but that’s not what he’s after - he already cuts a design like
that. Any help would be much appreciated - thank you.