StudioCanal has come on board to co-finance and handle international sales for “Inside Llewyn Davis,” an original script directed and produced by the Coen brothers.Scott Rudin will also produce, while Robert Graf, who most recently exec produced “Paul” and the Coen brothers’ “True Grit,” will exec produce. “Llewyn” centers around Llewyn Davis’ struggles as a folk musician during the genre’s 1960s heyday in New York City. Pic would mark the third team-up for the quartet, all of whom collaborated on “True Grit” and “No Country for Old Men.” Last week, StudioCanal snapped up French distribution rights to Rudin’s “Moonrise Kingdom” starring Ed Norton, Bruce Willis, Bill Murray and Tilda Swinton and directed by Wes Anderson. “Llewyn” filmmakers have not yet set a distributor for the drama. UTA reps Graf and the Coens.