Question Re: Barracuda ('68) Rear Folding Seat

All - I'm having problems with the rear folding seat in my Barracuda fastback. The seat will unlatch and fold down flat but not go back upright, one of the cams is out of alignment it is hitting other sheet metal that stops it. I think root cause might be the release rod (inside the rear seat) being bent, or other mechanical parts loose, etc. I am sharing this picture from the Plymouth Service Manual.

Anyone else ever had similar issue? My question is to understand the best way to access these parts that are inside the seat back, in order to repair/replace what is needed, etc. Also if replacement is needed are any parts difficult to find?

IMG_5641 Rear Seat Back Markup.jpg