They were also given as a 'bonus' to clients who where spending a lot of money on Guerlain products. I have the booklet with the 'Emotion' gifts you could get with your 'Nombre d'Or", The booklet is from 2000.
So, they must have been in production at that time, probably only for the Boutiques.
Not a year after LVMH took over, this system of rewarding faithful clients was abandonded. Just when I gathered enough to order one
I would not be surprised at all to see that those 'sucriers' are still available at the Paris Boutique when you would specifically ask for them.
That seems the way Guerlain is working these days.