Dan Trewartha: "Would I love to have the plans to build one of them!!!!(Hint, Hint)"
From what I understand people with enough computer skills can get the particulars of an object from a photo fairly easily.
I found a picture of one of the Crazy Horse frames on the Web. I don't have any idea how I could find the person who originated these, and there's always the possibility that he's got these patented, but I'm certain this photo shows enough of the frame where the engine/transaxle's mounted to give an idea of what you'd be working with.
I wrote to and spoke with the person who bought this frame. He's somewhere in Northern California, which sounds right as that's where the originator did all this at. Fellow didn't like the way the frame sat so he chopped it down to a VW trike. Sacrilege to my way of thinking as you'll never find these things again unless someone like you, Dan, can revive them.
Have Welder, Will Travel, right?