Try going to the HI archives forum on this board and searching “Ganga Ram”. Then go to the oldest search results first. You will find things like this thread.
https://www.bladeforums.com/threads/the-ancient-kami-and-the-magical-khukuri.125529/
Some of the pictures may be gone but you can get a lot of the story. I have some pictures of old Ganga and his work but I am not where I can access them at the moment. If you really feel like digging there are some posts by Bill in the archives predating the earliest mention of Ganga Ram, when he had heard of the legend and rumors and was tracking them down.