This quest is not available in game.
Bring 2 Enchanted Thorium Bars and 2 Enchanted Leather to Vargus at Cenarion Hold in Silithus. You must also bring Logistics Task Briefing IX in order to complete this quest.
Vargus, Cenarion Hold's blacksmith, has requested enchanted materials to be used in the crafting of powerful weapons for our forces. Obtain these and bring them directly to Vargus so that Cenarion Hold's troops may continue to be well equipped.