Cello or Trombone Play-Along - When I Walk Alone by Jan Hadermann - with sheet music

This is a play-along for Cello or Trombone with piano accompaniment as backing track.
The trumpet sheet music is shown in the video, but if you like this piece, please purchase it from an official seller.
Original instrumentation: wind band with trombone solo.

[@jo-jx2xk]

Hello, where can i buy the sheet music? Im not able to find it in the internet, only for trombone and brass band but not only with trombone accompaniment. Thanks!