Is there a motorcycle shop close? Just pull a pad from the frt and/or the rear and take it to the dealership and see what they have in stock that matches. Tell them you don't know what bike it's from as it's a friends, because if you tell them Ducati, they'll tell you they don't sell Ducati parts. All materials differences considered, "a brake pad is a brake pad."
................someplace close to you I would check is Boulder Motorsports. Brian Sharp is the owner & JT is another guy there. I just met them a month ago at the Colorado Moto Marathon when they were one of the sponsors of the event. Great guys & should definitely have what you need. Ph. 303 495 3416 www.bouldermotorsports.com If I lived where you are I would be dealing with these guys, they're top notch. Tell them I sent you.