You need the "organ edition". Fortunately it's still available at Neumann Press, they even have a spiral-bound organist's copy.
My copy is from when I played the organ at church. Your link to where to buy it is helpful.
However, a real musician wouldn’t have problems in playing it, in the same way we play from a “fake book”. True, the problem is that many organists play the notes but have little musical talent, but that is another problem...
I suspect many of us hesitate to volunteer to play the organ because of the lousy music etc.