Wanted: Q.R.S. Piano roll "Stumbling" (Played only by Zez Confrey)

Q.R.S. had published two versions of this roll under the same number:
Q.R.S. 1938.  One version has Zez Confrey, Max Kortlander and Victor
Arden, and the other roll has only Zez Confrey playing.

I heard / saw the roll recently on YouTube; when I questioned the owner
of the roll, I was told that it's rare, but both versions were given the
same number.

Thanks!

John King

 [ YouTube video at https://www.youtube.com/watch?v=J3WoCV7HY-g 
 [ Historian David Jasen told me 50 years ago that QRS issued _three_
 [ different performances of "Stumbling" as number 1938.
 [ -- Robbie