While you might find old versions (like the 2002 CFM56 course) hosted on archive sites or social media, these are rarely authorized.
If you work for an airline or MRO, always use official AirbusWorld or your operator's document management system. If you are a simmer, use legitimate free mods (FlyByWire, Toliss (paid), etc.). If you are a student, ask your instructor for legal access.
(for Microsoft Flight Simulator) and Flight Factor A320 (for X-Plane) feature near-100% accurate system depth.