I have got 2 of these NOS fenders for sale which were/are still in clear bags. No fading or damage. The brand is HP (pretty sure its not Hi-Point or Husky Products though) and it is a copy of the Acerbis Baja and similar UFO and Polisport rear fenders. The yellow colour is an odd one. It's a fairly bright lemon sort of colour but I would not say its fluro or safety yellow. It is not a good match for old RM/PE yellow. I have shown a PP light next to it to try and indicate colour better.
The PP light is not for sale. The fenders do match an old Malcolm smith tank i have pretty closely. The yellow might be a good match for a 90's Husaberg or Husqvarna or some small euro brand bike like an Ancillotti or something like that. The black extension is held on by 4 small removeable plastic rivets.
$15 each (probably worth it just for the lens which will also fit Acerbis/UFO/Polisport rear fenders)