This quest is not available in game.
Bring 6 Thick Armor Kits and a Wildvine to Jangdor Swiftstrider in Camp Mojache.
Wild Leather shoulders support a wearer's frame extremely well, offering superior protection of the upper arms as well as the shoulders. As with all Wild Leather armor, a random yet very potent enhancement is imbued within the item as the wildvine is stitched in.
For this pattern, I will require six thick armor kits and a wildvine. That shouldn't be too tall of an order for you to fill.