I have for sale a factory John Deere tail light that was removed from a 2 cylinder tractor years ago. I am told this was used on A, B, G, M, and R. You may wish to confirm that this is correct for your specific application. It appears to be in fair condition overall, but does need to be restored to be nice. It has pits in the metal, but I have not noticed any holes. You will note in the pictures that the edge of the tail light lens is chipped. However, I can't see the chip when the light is assembled.
$29