I don't know of an official source, maybe Ramalina or Despon do, but I do know that between unassembled components and CXP, GSF is the best bang for the buck for Galactic Command. I use it as the primary gearing route for the majority of my toons at this point, since I'm apprehensive about doing ground pvp until I have more 242+ pieces and I just don't have the time to commit to a progression team to get the unassembled tokens outright.