blade,
Ducati makes a wet clutch 6speed that will fit the 750. It was from the old 400cc bikes. A 748 will NOT fit as it is too long due to what you were asking about in your other thread. It will fit a 900 due to also being a dry clutch. You can buy a new 6spd for about $700 (if I remember right), and it's a direct drop in; I have one in my 750sport. If you want, I have a spare 6spd in my spare 800m motor(still in the cases, I would have to pull it).
If you find a binned 800ss/m, you can pull it from that one and you'd be a-ok

. Hope this helps.
Brian C.