Raleigh Triangle - Sweet Corn Tamales?
I'm not sure about the Raleigh part of the Triangle, but you might look for Salvadoran restaurants (or Salvadoran-Mexican, which is what most local Salvadoran restaurants really are). South Durham has a couple of good ones, including Cuscatleco. There was also somewhere my husband and I used to go, can't think of the name of the town, out the western side of Chapel Hill. Don't think it was Pittsboro, but if I saw the names of highways, I'd know which one. Little hole-in-the-wall-ish place along a highway other than obvious ones like 54. Will return if I think of it. In the meantime, I repeat: Look for Salvadoran restaurants, because from what I've seen it's more Central American than Mexican -- though that could be because I learned of it from Salvadorans!