This item is acquired in-game. See its sources below.
A Rare Mail Chest, item level 41, binds when picked up.
First seen in build 12.0.7.68887 (Midnight (patch 12.0.7)).
In the Appearances collection, Wildwood Wrangler Vest is listed as Quest. Appearance ID: 21906. 3 other items wear the same appearance:
Read from the World of Warcraft client build files.
4 quests list Wildwood Wrangler Vest among their rewards in Blizzard's quest data.
Foundry-Fired Plate Chestplate, 
Overgrowth Cutter Vest, 
Steamburst RobeFoundry-Fired Plate Chestplate, Overgrowth Cutter Vest, Steamburst RobeFoundry-Fired Plate Chestplate, Overgrowth Cutter Vest, Steamburst RobeFoundry-Fired Plate Chestplate, Overgrowth Cutter Vest, Steamburst RobeRead from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Wildwood Wrangler Vest suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Wildwood Wrangler Vest uses icon file 929917, which 25 other items also use. The 7 closest by item ID:
Sha'tari Deadeye Vest ID 112510 · Armor - Mail · item level 42Slavebreaker Chainmail ID 112442 · Armor - Mail · item level 39Thorn-Encrusted Mail ID 113152 · Armor - Mail · item level 40 "Thousands of tiny thorns are jammed between the armor's links."Leafscale Chestguard ID 114252 · Armor - Mail · item level 40Rylak-Scale Vest ID 109060 · Armor - Mail · item level 40Scaled Riverbeast Vest ID 116124 · Armor - Mail · item level 42 "The tough outer layer of skin is similar to dragonscale."Grimfrost Frostmail ID 117502 · Armor - Mail · item level 40Blizzard numbers items as they are created, so the named items next to ID 112589 (112584 to 112594) were usually added in the same batch as Wildwood Wrangler Vest: the same quest line, zone, vendor or reward set.
Teroclaw Feather Necklace ID 112584 · Armor · item level 42
Ra'tok's Throatguard ID 112585 · Armor · item level 42
Riverbeast Femur ID 112586 · Weapon - One-Handed Mace · item level 42
Riverbeast Tusk Shank ID 112587 · Weapon - Dagger · item level 42Foundry-Fired Plate Chestplate ID 112588 · Armor - Plate · item level 41Overgrowth Cutter Vest ID 112590 · Armor - Leather · item level 41
Foundry-Fired Plate Warboots ID 112591 · Armor - Plate · item level 41
Steamburst Treads ID 112592 · Armor - Cloth · item level 41
Wildwood Wrangler Sabatons ID 112593 · Armor - Mail · item level 41
Overgrowth Cutter Boots ID 112594 · Armor - Leather · item level 41The raw ItemSparse values for item 112589 in the current client build.
Read from the World of Warcraft client build files: Item, ItemSparse, Lock, Holidays, AreaTable and CollectableSourceVendor.
TheWoWDB