The game's collection data lists Power Generator Hood as sold by 3 vendor NPCs in Orgrimmar, Stormwind City and Dalaran. The first vendor stands at 37.9, 70.8 on the Orgrimmar map.
Vendor NPC, zone and position come from the client's collection source tables (CollectableSourceInfo and CollectableSourceVendorSparse); coordinates are the in-game map readout.
Build history
First seen in build 5.5.4.69585 (Mists of Pandaria).
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Power Generator Hood Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Power Generator Hood suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Power Generator Hood is part of the transmog set Firelord's Vestments (Mage only). The other 16 pieces:
1 other item in the current build is also called Power Generator Hood. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 59219 (59214 to 59224) were usually added in the same batch as Power Generator Hood: the same quest line, zone, vendor or reward set.