Lily,
The belly pan is an add-on but is mighty expensive if buying from Ducati.
If you didn’t want to cut the lower fairing, and I wouldn’t either, you can buy the left and right lower half fairings for a 998s, and the carbon belly pan from the 998s and hey-presto…!
Or you can buy two full fairings and the belly pan, as comes standard on the 998r. I think casoli do some fibre-glass moulds for about £300.00 – I think.
The first option will set you back the best part £600.00 from Ducati, but they will be the proper bits and come painted (expect the belly pan).
Hope that helps.
Yellow forever.
Fras.