Yes they do. I recently got a set of reproduction CS grills and the spacers from ProSport in the UK and you do need the spacers to fit them. They look for all money like the OEM items once installed, especially on a Nero 360 like mine.
I will get a photo this week once the car is off the rack and back on the ground.
Current Fcars: 360 Modena
Gone but not forgotten: 360 Spider, 575M, F430.
Other stuff: '71 Holden GTS Monaro, '80 BMW Alpina B9, '74 Porsche Targa, Caterham, MB CL500, Land Rover Discovery.