I looked through quite a few parts websites without any luck, but it seems that I was not looking in the right category, as I seem to have found it on this site in Rocker Panel Trim pieces.
I believe that the part that I need is marked #9. Thanks for pointing me to this site.
I quess that I will have to take apart the drivers side to determine which fasteners that I need, as
it is not clear in this view.