Take the blueprints and travel to Shattrath City in the Terokkar forest. Once at Shattrath, go to the Lower City and look for a mo'arg by the name Sal'salabim. He'll probably be at the bar, drinking away his sorrows.$B$BBy the way, you may need to convince him to lend his assistance. Try to approach him with patience and understanding. If that does not work, use your fists.