I have 3d printed Lancia Montecarlo bonnet vents . Each comes with a pair of fixing plates , that grip the bonnet and screw to the vent from the underside . The vents have machined holes to take the brass screws . If yiu are an official member of the Lancia Montecarlo Consortium there is a discount of £7 per unit . Dm me with your name and membership number to confirm . Postage is UK mainland I can post anywhere at cost and you pay any import taxes . Any questions please ask, and see my other items !