This is very embarrassing. I was going through my new-to-me 2003 DL1000 this weekend to see if the services where up to date. After I got the bike back together I found this on the floor of the garage. It's a piece of rubber. I think it's from the rear rack, but I can't find a place it fits. I had all the plastics and the tank off the bike as well as the rack. Thanks.