The Backgrounds from the Rebellion Era Campaign Guide (starting p. 16) might help with that, as they can add additional class skills to your chosen class, which you can then choose to be trained in.  Backgrounds that can add Persuasion are as follows:<br/><br/><strong>Events:</strong>Scarred<br/><strong>Occupation:</strong>Academic, Celebrity, Executive, Politics<br/><strong>Planet of Origin:</strong>Alderaan, Bespin, Bothawui, Ithor, Kashyyk, Mon Calamari, Naboo, Ryloth, Trandosha