I have a Renegade with a GM barrel marked for Knight on the box...not on the barrel. There is clearly visible a third screw hole just showing in front of the rear sight. Anyone know of a buckhorn or semi-buckhorn aftermarket sight that will line up with these holes. Also a dovetailed front sight to match. Hate the sights on it...but they are very accurate. Vendor and P/N if possible. Thanks in advance