Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Rock Solid Legplates Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Rock Solid Legplates suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Similar Items
The 10 items nearest to Rock Solid Legplates (item level 50) in item level among Armor > Plate, Legs slot, from item level 39 to 60.
Blizzard numbers items as they are created, so the named items next to ID 137342 (137337 to 137349) were usually added in the same batch as Rock Solid Legplates: the same quest line, zone, vendor or reward set.