Concerto in Eb, S.49 (Koehler) [trumpet in Bb or Eb]
Classical. Edited by Elisa Koehler, Associate Professor and Chair of the Music Department at Goucher College. Includes piano score and combined solo part for Bb or Eb trumpet (Bb on one side, flip over for Eb part)*
* This despite what the cover indicates, "Part for optional Trumpet in Eb available as a download." It may come to pass that the Eb part is a download only, but at the time of this writing (Feb, 2020), the Eb part is *included* in the set.