Probably the biggest difference in the left side case in the older Pasos to the early '90's and later cases is the clutch slave location. The Pasos are in the clutch basket cover. If they are the same size and shape then maybe all that's needed is a plate to cover the slave cylinder hole. I would assume that the left side cases were pretty much all the same for similar vintage Ducs. If you know a good welder and machinist it could be repaired. It's risky because welding will distort the cover (twist & shrink) and then it would have to be machined flat to seal. They are pretty brittle also.
A low mileage, clean 750 is probably worth high $2's/low $3's. Admittedly they aren't highly sought after. They are unique in styling, being the first fully enclosed fairing Duc, but the 750's (or 906's or 907's) weren't especially fast and the odd size 16" tires have only one manufacturer, Michelin. The weber 2 barrel carb is finicky but a fuel pressure regulator helps. Parts are getting harder to find, but some can be cross referenced to other models.
Check out www.ducatipaso.org for more info. BOL.
A low mileage, clean 750 is probably worth high $2's/low $3's. Admittedly they aren't highly sought after. They are unique in styling, being the first fully enclosed fairing Duc, but the 750's (or 906's or 907's) weren't especially fast and the odd size 16" tires have only one manufacturer, Michelin. The weber 2 barrel carb is finicky but a fuel pressure regulator helps. Parts are getting harder to find, but some can be cross referenced to other models.
Check out www.ducatipaso.org for more info. BOL.