Check out any of the six R. Side Under Cowl Set components enlisted.
Some items from this specific schematic: Nut,platae 5mm, Cowl,r.und*r176c*, Louver R Side Und, Cowl,r.un*pb240m*.
The component with the lowest price in the R. SIDE UNDER COWL SET schematic is the Screw,4x12.