Where in the world do you get this?
The A&P needed for the MCAT should have been covered in your Bio II. If you had a weak instructor, I'd suggest you take A&P before the MCAT but if you don't I still don't think you're "unprepared".
OP: I think most schools just want 2 upper level bio classes for the pre-recs. Mine were Genetics and Microbio.