While I don't think there will be any price advantage as the Guzzi belt is dirt cheap for you folks in the USA if you are unlucky enough to have your belt snap while you're out on the road and there isn't a dealer local I've found that a Gates 4PK740 will fit the bill perfectly. I believe the Guzzi belt is a 750 but there's enough extra movement in the alternator to allow fitment of the 740.
Pete
Remember the Bellagio is a CARC bike but it still uses the crank mounted alt!
. I'm still staggered by that decision, the Bellagio is such a GOOD bike it makes me want to weep you don't get it.