Northwest Indiana's own rock music export, Troy Patrick Farrell, a former native of Griffith, returns to his old stomping grounds this weekend to showcase his latest project, Cheap Thrill. Since leaving the Region three decades ago, Farrell has spent time as a member of the national recording/touring groups White Lion, Tantric and The Gilby Clarke Band. Farrell gives his first hometown performance in more than 30 years this Saturday when Cheap Thrill rocks the newly…