Check platforms like YouTube Movies, Google Play, or Apple TV. While they rarely offer the 3D version anymore, they sometimes offer the 2D version in 1080p. You can then use third-party software to convert 2D to 3D, though it won't be as good as the native 3D.
Searching for "Haunted 3D download 720p" typically leads to various movie streaming or torrenting sites, but finding a high-quality, safe version requires knowing where to look. Haunted – 3D