Which supermarket sells this candy? I tried Kroger, Walmart, Sams and Costco. They have the original, but not the sour.
Tried 99 cent store or Dollar Tree? They usually have a huge selection at those stores. Might try it.
Many of those stores sell expired candy, chips, and even Tylenol. But yeah, I would try the dollar store.
If you soak normal Jolly Ranchers in Squid Eggs for 3 days they will taste very sour. You can try this if you don't find the store bought kind.