I recommend that you have the DLCs installed for the hairstyle to appear.
[Saints Row 2] PC DLC
About:This a project that ports over all of the SP DLC content - this includes the clothing, NPCs, vehicles and missions from Ultor Exposed, Unkut & Coporate Warfare. MP content might come at a later date, but the co-op functionality works and you can play the missions with a partner. Additionally, it has fixes for oversights with the original DLC such as arc-based unlocks being instantly...
