I wish I knew about these, its funny, I never knew these were a staple around Passover, I'm going to get a box the next time I go to the international market. As for producing them, I personally would go the route of making a pate de fruit and enrobing.
Searching on amazon, I've seen the jelly rings made from agar.
Sugar, corn syrup, chocolate, agar-agar, citric acid, artificial flavor, US certified color (includes red #40 and blue #1), chocolate contains: sugar, chocolate, cocoa butter, soy lecithin (an emulsifier), vanillin (an artificial flavor)
As for the form, I have these:
It does work well, I'm not sure what brand it is, these same molds seem to be sold under a dozen different 'brand' names. Anywho, I do use this mold for gummy rings, it works well, you just need a funnel for depositing.
I hope it works out!
