If it's 16:9 the whole way, it might have just been cropped from the 2.35:1. Either way, can you do a capture?
I've got the whole film cut together using the Enhanced Commentary. There are lots of parts that can't be fixed due to either a BTS shot plastered on the frame or actual missing frames.
It would just be a matter of plugging the appropriate scenes in and seeing if they match. It would be pretty simple.