I've never seen one. You might try Winchester direct but I'd bet it'll cost you.
Why not camo it yourself? Cabelas sells a four color cammo paint kit with a stencil for $19.00 with good directions. I used one on an old Winchester 1200 including the metal about six or seven years ago that turned out real well and has held up. I like it as well as factory cammo. It was an easy job. Make sure you get any oil or grease off first and follow the directions.
