The Chantrelle was a good find!! They are not common. For what it's worth, they came in two sizes, I think yours is the smaller one, as is the one I bought this summer. A friend of mine has both sizes along with a couple hundred more. He has the largest multi-tool collection of anyone I know.
My wife collects these, with my help, and we've only managed to gather up about 30. I got several this summer, but since we've come back to FL I haven't found any; in fact I didn't find any at all last year in FL. Maybe Brian got them all.
Mike