There are numerous plugins that can handle the 3D rotation, you could even make your own in Motion faulty quickly. The two I have installed are "Andy's Better 3D" and "Bretts 3D". They don't do a two sided rotation but you just rotate to 90º where the image is invisible, then swap images and continue.
Jeff Kirkland | Video Producer & Cinematographer
Hobart, Tasmania | Twitter: @jeffkirkland