try Petersen Brothers in Chicago, Il. They have made every replacement window (6) for my ODay 272. Installation was easy once removing the screws, slipping a cake frosting tool between the hull and window, removing all adhesive. Then re-install your new windows using Dow 795. Oh' buy the way, Acrylic is prefered over lexan as it will last longer. And Petersen Brothers stocks many, many colors of 1/4" material.