I have met another guy who says he has a wrapper. I think Larry Serota has or has a scan of a box. Although I do not think they were retailed, I have seen posts where people say they have cards with gum stains. I think they entered hobby through the Card Collectors Company or other source who ended up with un marketed product. Maybe Dave Hornish knows more.
My set is all ungraded and most of it was acquired before grading became the rage it is now