GANDER <GNDR.O> BUYS WESTERN WEAR RETAILER Gander Mountain Inc said it acquired the privately held Western Ranchman Outfitters, a catalog and point-of-purchase retailer of western apparel based in Cheyenne, Wyo. It said Western Ranchman had sales for the year ended Jan 31, 1987 of about 2.2 mln dlrs. The purchase was made for an undisclosed amount of cast.