This is a common mod that a lot of people have done over the years, including me on my 600/620 race bike!
Ducati sold a "Ducati Performance" airbox lid that was basically a cut-down version of the original lid. When I did mine, I just cut the lid down myself, making sure that there was a lip left at the front as per the DP version. You've already got the K&N filter so open up the lid before you get it on the jets changed so everything matches.
