I have composed/arranged a number of shows for marching band. I pride myself on writing interesting music that is playable (good keys and ranges) My shows range in difficulty from Grade 3-5 . If you find an arrangement or a complete show that you like, you can purchase it, or it can be customized to fit your group for an additional charge. Tell me your strengths or weaknesses, and I can tailor an arrangement that will make your group sound its best.
My arrangements usually include fairly elaborate pit parts but NO battery percussion parts. I found over the years that most good marching bands have percussion instructors that are more in sync with what the battery is capable of. So, I leave it to the band director to provide his own battery parts.