I nearly bought one of these new when I had my M900 but went for the standard shape in carbon instead.
It was in the Ducati Performance catalogue that Moto Rapido gave me and had the part no. 96911599C and was for models up to 1999.
It was originally made for Ducati by Gio.Ca.Moto with the part no. 09112.
A little bit of history from the 1999 catalogue.