not a clue.
there is quite a bit of tobacco products behind the service counter at Lings grocery.
cigarettes, cigars, pipe tobacco....unsure if there is chewing tobacco.
tell your friend to bring his from home.
Ruba Reggae, down off the main street when you're coming into Oranjestad, the street across from the bus station (around the corner from Diamonds International), would likely be the best place to look. They carry a large selection of tobacco products, and I'm pretty sure they have chaw.
You can only look. And if I'm not mistaken, I think I saw some at the grocery store, that would be Lings... in the tobacco section behind the turnstile.