going from memory here....
Right before my car was stolen I recovered my seatbottoms with used factory cloth. I cut strips of padding (much like the bottom of the trunk liner) and placed two rectangles on the middle section and two strips on end bolster.
When The seat was installed it make the center crease held down by the rod look much much better, and the bolsters actually worked again.
Plus it's a little cheaper than buying new foam and hoping you don't have to fight with it