well i am sure there are some stores that sell what we buy online from places like ecigexpress,bcv, etc. I mean FA didn't just start making flavors for vaping. They have been around for years. But I doubt your going to find the flavors we use at a walmart, It would be a store specializing in baking and cooking. I know I have seen food flavorings at places like Michaels (arts and crafts) in their bakery aisles. but I don't know if that stuff is vapable, I did plan on my next trip there to look and see. A restaurant supply store might sell the right types of flavors.
Many places sell Lorann's but alot of Lorann's is not vapable.
So take a look at your local stores in the bakery aisle. And double check anything you buy before you vape it. You could also try the manufacturer's website and see if the list dealers etc and if they do check your zip code.
Vape stores that cater to DIyY are great for flavors.