The textures are included with the "Project Source Files" download located in the Course Files tab of the course home page: https://cgcookie.com/course/shading-fundamentals-in-cycles/

Couldn't find them either, so I saved them out from the blend file. It worked.

Ah ok, I think the confusion is that the textures are packed into the .blend file. You can save out the textures externally if you want like Balazs suggested or you can unpack them by going to File > External Data > Unpack all into files

"Unpack all into files" isn't doing anything. I load up fundamentals-texturing_shader-orb.blend and select unpack and I get an error that says "No packed files to unpack" It happens whether the orb thing is selected or not.

Hi. I unpacked all into file like you suggested but the only image available was the corporateinterior one.

Nevermind. I'm a noob but I figured out how to unpack them :) Really appreciating the course.

I get the same problem, no matter wich way I unpack I only get the corperateinterior image

Sorry that was stupidly easy I figured it out aswell

I only have the corporate lighting image as well

Nm, unpacked the finish blend instead and there all there! Awesome course!

Just found 'em. They're packed in the cycles finished file but not in the starter.