No, not an aftermarket thing, Yes, it was fitted to the Tricolore S4RS only.
from somewhere,>
In 2008 Ducati released the “ultimate expression of the Monster” via a limited run of only 400 Tricolore edition S4R S’s — 250 of which were sent to the US. Adorned in the classic Italian flag livery, the S4R S Tricolore also featured carbon fiber front fender, radiator cover, side-covers, cam belt covers, and heat guard and silencer cover for the model’s stacked dual aluminum exhaust. Each of the 400 units also came with an individualized number plate.