Trombone Solo - Level 3 - Digital Download SKU: A0.607587 By Post Malone. By Austin Richard Post, Billy Walsh, Carl Austin Rosen, Carl Rosen, Carter Lang, Khalif Brown, Louis Bell, and William Thomas Walsh. Arranged by Kevin Busse. Pop. Individual part. 2 pages. Kevin Busse #4765245. Published by Kevin Busse (A0.607587). This is a simple transcription of Sunflower in a good range for Trombone.