Dr. Scholl's shoe inserts available at Disneyworld?

[Grandma of twins]

Just heard from a friend who is on day 5 at at Disneyland. Feet are killing him and he'd like to find some Dr. Scholl's shoe inserts (or something similar to get him through the next couple days. Is there anywhere in the park to purchase these? Alternately, is there a store that delivers?.