The ones pictured from Goofy's aren't as big as the ones at the confectionary shop.
In my experience that is the best place to get them. Some of the rice crisprie treats they sell on property are farmed out to an outside company and they aren't nearly as fresh tasting.
They might have them at the confection shop in HS (next to The Villian store, near the ride wait time board). If you are facing the board, go right. The Villain store has big display window. The candy is on the left side.
There's also the Candy Cauldron in DTD. It's near Disney Quest. I'm thinking they had them there, but I haven't been to DTD in a while. That is a really cute shop.
The ones at Goofy's, you can pick which candy topping you want. They dip it fresh for you.
It is my experience that those are the four locations that make their own chocolates at least.