No it's not in the AE - not in its own tab anyway. I can see the create button under 'environment ' in the camera shape AE, but clicking on the little connection arrow does nothing.
It's not in the outliner either, even with 'DAG only' unchecked and 'shapes' on.

Just a thought - I've linked a material and image to the camera to create the projection. Would that alter the connection hierarchy?