They're the same part...
https://www.bike-parts-ducati.com/du...OLS/84/33/0/84
https://www.bike-parts-ducati.com/du...R/82/1207/0/82
£62.94.
When I broke my RH mirror the used ones available at the time didn't look in good enough condition. So I bought a pair of copies from ebay for under £50.