9b11f552____Final_Fantasy_X_2_Item_List__Location
[Name] Syndicate Uniform (M) [Description] Courtesy of Leblanc's goons. [Location] 
Obtain the 'Letter of Introduction', (see below) and head to Bikanel Desert during Chpater 2. Give the letter to Nhadala when she arrives and select to go to the Oasis. There you'll find Rikku's Machina Maw Special Dressphere, pick it up to innitiate a battle with Logos and two Fem-Goons. Defeat them to obtain the uniform.
Final Fantasy World - Final Fantasy X-2 Item List
Location