For anyone who might be curious about this topic, I found this article from the current issue of the Forward interesting. Both guys quoted in the article credit (different) candy stores on 2nd ave as being the source - sounds likely to me... But it's actually the list of ingredients that I found fascinating.
BTW, this is the first time I've tried posting a link -not sure I'm doing it right. If not, let me know & I'll try again.