Hi Jason, again VERY NICE, CONGRATS!!!
If I'm reading my sheet correctly, the washer was built in December '59. Also, the little "center cap" for the timer knob is copper-ish colored aluminum, not plastic. I agree, Combo52 may have one laying around.
Yes the agitator has been replaced. It would have had the stainless lint filter as well. A couple years ago I did buy a black plastic replacement agitator off of fleabay, but it was a different type of plastic, not bakelite.
Kevin