As a Cinemax original series, it is primarily available here.
Instead of searching for specific "scene" or file releases (like "3LT0N"), you can stream the episode on official platforms: Watch Banshee S01E03 HDTV XviD-3LT0N-[GTtvSD]
In the context of "scene" releases, a "PROPER" tag usually means the first release was flawed (e.g., bad audio, frame drops), and this new version was released to fix those issues. Banshee, Season 1, Episode 3: Meet the New Boss, Review As a Cinemax original series, it is primarily available here