I have used Van Sickle industrial enamels.  Their Case power white comes close and their Oliver green isn't  bad at around $20 a gallon. Farm supply stores  Like Gebo's or Tractor Supply carry it.  I recommend using their hardener as instructed to avoid dusting and chalk fading.
     Your steering gear should be the same as the Ford  boxes as Saginaw made for both manfacturers.  Alexander Ford Tractor parts in Winnsboro, Texas wrecks out only Ford/New Holland stuff , and they are knowledgeable and great to deal with if you can't find anything closer.  I drove 400 miles and got there late and they came down after church and sold me the order I had called them about so I could be back on the road to meet family 2 hours on down the road!!