No green in my 301A.
But I found something else. Behind all the "works" is SIMANCO U.S.A. 170001 and then a small circular symbol and a small 3. On the back side of the "door" is SIMANCO 170029. These might be numbers of that part.
I'm still looking for a ruffler for my 301A. I completely wore out my ruffler with 4 daughters and square dance dresses.