I am not sure if that was factory, but hey.. I certainly wouldn't be surprised. As far as getting more, I would think it would be pretty easy to duplicate. Since from the pics, the pattern repeats itself every 8" or so, you could simply scan in an undamaged section. Once done, you could use a paint type program to stitch together the pattern to a size larger than needed (or if you're comfortable with using a vector-based drawing software like CorelDraw or Illustrator). Once done, you could simply print the pattern onto a clear one-side adhesive material (maybe challengergary?). Then cut to fit.
Grant