Ah, thanks for the heads-up; I assume that was an oversight. Let's see if we can get that sorted.
Untill that gets fixed, you can, if you want, grab (and Append) the model from the Course Files from an older Course: https://cgcookie.com/lessons/shading-the-orbot
CTRL+J to join the 2 Objects and maybe Delete the 'Lens' in Edit Mode.