odd question, but will a tonneau cover for a 3rd gen RAM fit a 2d gen RAM?

edit : in case it makes a difference, it's fiberglass.
i didn't buy the cover so i do not know the brandname .. looked all over the crap and could only find what seemed to be cerial numbers

 

IIRC the short bed on the 3rd gens are shorter than the short beds on 2nd gens.

 

won't work

 

thanks for the quick yet disappointing replies