According to the sales bulletin I have, they were just like the 1200 and 1470 cabs, you could order them when you bought the tractor, but the dealer had to install them. Most dealers did not do a very nice job of cutting the holes in the fenders. I would never add one to a tractor ,just because you would ruin the fenders.
This tractor came from it"s second owner in Virginia. He knew the tractor from new, and said it was at the dealership with the canopy.