adjust the actual bonnet on the hinges, 4x10 mil bolts i think, if the bonnets too far forward then lift the bonnet up, undo bolts, let it drop slightly, retighten, if its too far over to one side, undo bolts, push it over or pull hinges over then retighten, just trial n error really.
as for the bonnet catch, get the old bonnet next to ya n just drill what needs drilling so it looks the same, adjust the catch to suit, probably torx bits needed