First of all, thank you for your replies and offers of parts!
I spent the afternoon making a 1/8" gasket to use as a spacer under the forward cover. I attached it to the cover with, what else, JB Weld. I might have to buy stock in that stuff if I'm going to keep the Ducati.

Anyway, the spacer seems to be just what I needed to get enough clearance for the cover to fit safely. I doubt it's a long term fix, but should last for a while. I'm going to give it a test run tomorrow after everything cures. I'm pretty sure I'm going to still want a spare cover in case this turns out to be no good. I'll post again and reply to those who made the offers of parts as well.
In case Valence or BenFer is listening in...I sure am interested in a vented CF belt cover...
Thanks again everyone. This board rocks.
Best regards,
Jeff