I just saw this thread. I did this to my previous 900 by just removing the 4 bolts on the forks. I fabricated a bracket that was just large enough to raise the holes up by 3 quarters of 1 inch. then re bolted the fender to the bracket, and then the entire assembly back to the forks. Problem solved. I am fixin to do this again this week to my new 900.
'09 Orange Copper Custom. Debaffled, 170/80 - 15. Bags, and shield.
Gone but not Forgotten - '09 900 Custom SE. Debaffled. Avon Venom 90/90/21 front and 170/80/15 rear.