looking for case ih planter parts


We recently bought a 2004 case ih 1200 series planter. 12 row, 30 inch spacing. I am wanting to make it into a 16 row 20 inch. Im in need of 4 row units with capabilities of automatic shutoffs. I prefer if it is set up for smart boxes and no till. Im located in NW Iowa please call or text 712-441-5072 if you have something that I could use!