Well, My only flag that I had was from 1987 and it was celebrating a scudetto (I think it was their 22nd), and I gave it to my nephew.
However, I do have this. A Scarf from 1987 and my Juve Jersey that I had autographed. If you look closely in the middle, you will see one that you immediately recognize. I hope this makes up for a lack of a flag.