For latin, you're pretty much stuck with Super Mercado and a few other smaller ones in the South O area but I'm not sure the differences between Central American/Carribean and South America. My wife is Puerto Rican and it's not fun hunting down authentic stuff for what she's looking for on the holidays. Took me like forever just to find all the ingredients for coquito and don't get me started on trying to find the right type of fish for bacalao.

Don't bother with the normal super markets, most of them think latin is salsa, Cholula and taco shells. Fresh Thyme has a little more Goya products but it's basically beans, possibly rice and maybe tomato sauce.