There was someone making these together with clear screen in batches a few years ago - extensive search on here should find thread..
Wasn't it @Petsmith that made them? Thread here https://www.ducatiforum.co.uk/threads/ducati-748-s-question-my-new-bike.87801/#post-1880752 Not found in the forum search function, hasn't ever worked for me other than more mundane stuff. Resorted to Google which finds a lot more on this forum.
Ok so when you cut the outer bezel with the glass in it there’s another black plastic bezel/ring which sits inside that it I think it’s more of a gap filler thing.