Does anyone know if the 1985 Toyota Pickup single cab's came with a trim piece on the back wall of the cab?

I have been working to insulate and sound deaden my old pickup and would like to do the back wall as well. I just don't think I would like the look of the sound deadening behind the seats if its not covered by some trim or something.



Were there ever trim pieces that coved the back wall of the cab? I know I have seen them in the Xtra cab trucks and the diagram below (#5) seems to show one for the single cab but I cant find any other pictures.