The S-2 Sport Cub was modeled after the full scale S-2 manufacted by Cub Crafters in Yakima, WA. Here is the link to Cub Crafters.  http://www.cubcrafters.com/sportcubs2
The Areoworks rendition looks pretty good to me. It was not supposed to be a model of the PA-18 Super Cub. They even have Cub Crafters blessing on it.
Check it out..........