Galveston....any place near the port to pick up a 12-pack sodas?

We are taking the Carnival shuttle from airport to port, so we won't be able to pick one up prior. Is there a store within walking distance of the port to grab a 12-pack of diet dr pepper? If not, we will just order online from the Fun Shops a dozen coke zeros, but that is more than double the price of getting it at a local store. Just looking for info.

thanks

There are some stores on the Strand that open around 10am, Only about 5 minutes walk from the port.

thanks, I will try to look it up to see where that is.