For the main body panel, I basically made a slanted box with a shelf in the middle. The bottom of the box is open to provide clearance for the motor, drive chain, and rear wheel.
The shelf in the middle houses the controller and the three 12v batteries. This rear body section was made from some scap 1/2" plywood I had laying around.
The front panel (on the forks) was made from a piece of scap masonite.
I found an adjustable bicycle kickstand at WalMart, cut it down to fit the scooter, and bolted it to the frame.
The floor board was made from plywood and covered with stair tread for protection.
The seat was made from a piece of plywood as a base, and covered with high density foam and vinyl.