Hi Ian. You could try Xtra Special Sevens (U.K.) for the scoop as they also seem to make reproductions of Lotus parts. If and when you decide to fit the top scoop to the bonnet of your car, either using your old bonnet or a new one from Arch or Xtra special 7s, advice from Bruce Robinson of Arch may help. He advised me to install the down-draught manifold on to the engine with the carb correctly bolted on (engine in the car of course!). Carefully lower the bonnet onto the carb with the air filter studs installed, and fasten the bonnet in place. Gently tap the area of the bonnet that is directly over the carb with a leather or rubber mallet to provide an imprint of the studs into the underside of the ally bonnet. Then remove the bonnet, and using the top of the air filter as a template, line up the holes in the filter top with the indentations in the underside of the bonnet, and draw around the filter top. Allow a small bit of clearance around the hole to be cut out, but check the necessary diameter by placing the air scoop over your drawn lines to ensure that it is not excessive. Bruce also advised that Arch do not cut the hole in a new bonnet for a customer, as there are always slight differences in chassis, engine mounting brackets, and engine types (original 2737E Ford Crossflow slightly narrower block than the uprated 711M for example). The original carb for the pre-updated crossflow was a Weber 32 DFM, later replaced with a 32/36 DGV or 32/36 DGAV with automatic choke. There was also a 32/36 DFA or 32/36 DFAV produced by Weber (I obtained one from Dave Bean brand new) that correctly allows the throttle cable to attach to the carb in the orientation designed by Lotus for the Series 3. The 'G' version has it attached the opposite way round. Cheers, Will.