I recently went to my local Nissan stealership to purchase 4 new caps/covers for the brake fluid bleeder valves on my brake calipers and the guy at the parts desk told me they only come as part of a "repair kit" with other parts. Are you F'n kidding me??
I didn't even bother to ask what the price was. I just turned and walked away. Mine are weathered and cracked. Guess I'll figure something else out.