I bought the 2 I have at Tractor supply. I took a picture and picked the one that looked closest to the original seat. I had to make and adapter to bolt it to the tractor. Surplus center just start carrying these
Item Number: 1-5015-A I am planning on getting one for one the Massey's I have.
Here are some pics of the above referenced seat mounted on a 12, I liked the color combo, but it looks out of proportion to the tractor to me. The mounting rails and seat release for adjustment lever will not work , it will need to be modified. The seat is comfortable. I have it made to bolt right up and changed the mtg. rails so it's functional and will fit , any interest PM me.