Ironically, the "high-quality" MKVs from these sites often have sync issues, watermarks, missing audio tracks (especially the 3D left-right channel separation), or hardcoded Chinese/Asian subtitles.
If you specifically want the , you might need to find a legit Blu-ray or digital store that still sells stereoscopic 3D content.
If you genuinely want to watch Creature 3D , here are legal options (availability may vary by region):