Hi Peter,
I am not sure where I got that griffon. I tend to search the internet and find stuff in weird places. I think it might have been part of a wood carving on ebay, but I'm not certain. I usually find a few images on google images that seem to fit what I am after, and then add and subtract until it looks right and fits the space well. I do remember that the one I liked had a different kind of head on it and I changed it to that head that is more bird like.
This pattern was Clay Smith's "Christian Spring". It is a little different from the Marshall pattern that I have done before, and I really love the feel of this gun's architecture.
I have only been able to see (up close) two original step toe guns, and both of them were smaller overall than I expected.