I attempted to take pictures that show the right lower panel, the left appears very similar. My perception is that the radius for the large shape at the bottom of the side is supposed to increase as you move from rear to front of the panel to compensate for the taper in the floor but these panels the radius appears to be constant.
I don't believe that the short panel which you received are made any different than the full panels at the bottom. It has to do with the front-to-back taper which you refer to. I wouldn't use them.
I believe that I found mine at Jim Carters and based my purchase on the picture on his website. I could make out the tapered bend in it.
Kevin's pics show what the panels are supposed to look like at the bottom.
