Ducati considers both the plates and clutch basket to be wear items. By the time you need to replace the worn-out clutch plates the basket has been notched from the impact loads of the plates. Ducati specifies the allowable gap between the plates and basket as a quite small 0.6 mm, effectively saying to replace the basket and plates together.
Notched basket tabs will cause the new plates to hang up causing engagement problems.
My experience with the service life of Barnett clutch packs is replacement around 16,000 miles, versus 25,000 miles for Ducati packs — so take that into consideration when comparing prices.