In The War Within Early Access, there are a few renown venders offering 584 item level gear that players can purchase to get a boost in their item level.
The three factions that offer this are the Council of Dornogal, Hallowfall Arathi, and The Assembly of the Deeps. Depending on the faction, Renown Level 7 or 8 will allow players to be able to purchase a 584 item level Chest, Shoulders, or Helm on the Veteran track depending on the faction. These cost 0 Resonance Crystals. During Early Access, Normal and Heroic dungeons drop 554 or 580 item level gear at cap, making this renown gear some of the highest item level gear players can get before Season 1!
Council of Dornogal Renown The Assembly of the Deeps Renown Hallowfall Arathi Renown
You may acquire a ilvl 584 Veteran Shoulder from Auditor Balwurz in Dornogal at Renown Level 7:
You may purchase ilvl 584 Veteran Helms from Waxmonger Squick in Gundargaz at Renown Level 8:
You may purchase ilvl584 Veteran Chest armor from Auralia Steelstrike in Mereldar at Renown Level 7: