It looks like we share the same sanding station kit http://www.boche.net/trains/9-9-06/DSC03693.JPG I also installed the fuel and water stations from this kit.
Threre's a thread in the Minneapolis, St. Paul & Sault Ste. Marie Railway forum. I asked there about these engines. You're right, the same sanding station kit. I got mine years ago from Walthers. Wolfgang