The game's collection data lists Jinyu-Polished Shoulders as sold by 2 vendor NPCs in Warspear and Stormshield.
Vendor
Zone
Map
Waypoint
Other items it sells
NPC #86382
Warspear
-
-
15
NPC #86391
Stormshield
-
-
15
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.
How Jinyu-Polished Shoulders Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Jinyu-Polished Shoulders suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Similar Items
The 10 items nearest to Jinyu-Polished Shoulders (item level 39) in item level among Armor > Leather, Shoulder slot, from item level 35 to 39.
Blizzard numbers items as they are created, so the named items next to ID 92860 (92855 to 92865) were usually added in the same batch as Jinyu-Polished Shoulders: the same quest line, zone, vendor or reward set.