A lot of ingredients are regional, friend. If you are frustrated within the US with a US produced candy, think of how our members in Australia, Germany, South Africa and India feel. And we have some of the same frustrations when looking at recipes posted from people in those countries.
In any event, I don't know how anyone would know whether any product is sold only regionally or on a national basis. The repeat questions about a specific Kraft cheese product - Old English? - come to mind - sold in some places, but not nationally. And Kraft is in every market.
Anyway, I remember the candies from when I lived in LA. They used to be sold right be the register. They are a chocolate/mint combination and I suspect that any similar combination is likely to work.
Walmart ships,
http://www.walmart.com/ip/Andes-Creme-De-Menthe-Baking-Chips-10-oz/10403314
Or you can try contacting the manufacturer to see whether they have local retailers,
http://www.tootsie.com/products.php?pid=101 The manufacturer also ships.