Hi Rob
Hope you have a great time at Paris
I've been a couple of time to Disneyland Florida, where I first bought Scotch and Soda, and coin in bottle.
If I'm not mistaken, I remember seeing on the bag LA, Florida, and Paris.
The one I went to was located in Downtown Disney, which has all different kinds of shops and nightlife. If I can find the bag, the name of the shop or the number for them I'll let you know.
Just look for a big top hat on the outside of the shop at Downtown Disney. It won't be inside the parks.
The good thing is, the people selling show you the tricks, but obviously you need to pay for them to get the secret.
If however there's not one in Paris, I guess you'll have to go to Florida instead, *sigh*

its worth it
Have a safe trip
Mark