Structural Composites of Indiana Structural Composites of Indiana is a manufacturer of large, custom-molded fiberglass front and rear caps and roofs, primarily to the RV market, and specialty fiberglass components for the Transportation, Marine and other Industrial markets. Visit Structural Composites of Indiana Contact Info 1118 Gerber StreetLigonier, IN 46767Phone: 260-894-4083Fax: 260-894-4289