Given the high temperature and flexing these belts will see, combined with the critical specs for setting tension, and the severe consequences associated with belt failure, I'd pass.
Chris Kelley, who owns California CycleWorks, is a Ducati enthusiast and a reputable businessman who deserves our support, but in this case there is no evidence (other than anecdotal) that these belts meet Ducati specs and will last the replacement interval. This not a good place to save money IMO.