Kevin Costner sued for huge sum over unpaid ‘Horizon 2’ costume rental fees

Kevin Costner is facing a new lawsuit related to the sequel to his Western box office bomb, “Horizon: An American Saga.”Western Costume Leasing Company filed a lawsuit Monday in Los Angeles County Superior Court against Costner, 70, and his production banner Territory Pictures for breach of contract, claiming the defendants did not pay for rented costumes used in “Horizon: An American Saga — Chapter Two.”The lawsuit is seeking roughly $440,000 from Costner and his producers, according to court documents obtained by The Post.