Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
Where Shoulders of the Shadowy Conqueror Fits
Other Items Named Shoulders of the Shadowy Conqueror
2 other items in the current build are also called Shoulders of the Shadowy Conqueror. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Shoulders of the Shadowy Conqueror
Blizzard numbers items as they are created, so the named items next to ID 89262 (89257 to 89267) were usually added in the same batch as Shoulders of the Shadowy Conqueror: the same quest line, zone, vendor or reward set.