Yes, it is a replacement item. The culprit seems to be larger rocks tapping the rear rubberized protective housing. You might look at top swinging it to offer more protection, though we dont see many issues really. Newer models are top mounted.
The light that I replaced because it was broken was the Wagner H9414 and it was the same light that was installed from the factory when I bought my Cougar last fall. The numbers on the new light was the same exact number on the old one. H9414. It cost $18.99 at Orilley Auto parts.