A 27-year-old man was stabbed at the Lewis and Clark Motel in downtown Billings Wednesday afternoon, and police are looking for two suspects.  The man, described by police as uncooperative, suffered non-life-threatening injuries to both arms and his stomach.  Police described the two suspects as Native American men in their 20s, driving a dark-colored Chevrolet pickup truck.  The stabbing was reported at 12:30 p.m. at the motel at 1709 First Ave. N.