Ahh I did a google search. To reproduce the movie wand would require a sh*tload of carving.
But I did fund that most of the sites selling wands like
this one
are just selling smooth tapered and turned wands. With a nice website or place to sell, you can make a buck at this it seems.
If your making the smooth ones, all you would need is your lathe, turning tools, sandpaper and finish products.
Keep us informed of your progress!