Here's the piggybacked answer:
Read the FAQ about chopping the tail:
http://www.ducatimonster.org/faq/faq_tailchop.html. It's fairly easy to make your own bracket out of a sheet of aluminum. I cut a hole in the bottom of the tail light and stuck a piece of clear plastic in there to serve as the license plate light. I like the look of attaching the original turn signals directly to the frame, but I wouldn't recommend it, since any little mistake can be very difficult to fix. If I were doing it again, I would get a one inch wide sheet of 1/8" aluminum and make a turn signal bracket to position them about half an inch below where I put them on my bike.
Here is the finished tail:
If you look at this photo (right before drilling the holes for the signals), you'll see that the frame was cut a little too short to leave room to properly mount the signals. I was just looking at Juan's bike (yellow 620), that has about half an inch more tube left. He drilled the frame for his signals and did a much better job of it than I did.