It would be fairly easy to wire up one of these, couple layers of shrink tube to insulate it, and slide it into a dedicated panel hole. That is if you want a permanent USB outlet.
The cigarette lighter outlet, and adapter gives more flexibility IMHO.
One of the guys who make the above panel mount outlet
is a neighbor, I will check to see if they can up the output.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."