Hey chadhargis,
I have been thinking about some sort of cubby as well. You may have figured this out by now, but just in case...there are six screws that hold the front body panel/headlight piece to the black body. They are easy to see from the the inside cowling. 3 on each side of the steering down tube. Once those are off, there is just one more chromed screw on the front by the headlight. If you take that piece off (5 minutes tops), you will have full access to the area behind where the cubby would go. You would be able to then use a nut and bolt to secure your cubby.
Good luck. i am trying to locate something that might fit and will keep you posted.
Be safe,
Kris