Is the scratch trumpet too unrealistic for your purposes? Here. Problem solved. I will make a "Brass instruments" scratch project. I might make more slightly more realistic Scratch sprites.
Edit log: 5/27/2022: Added details such as braces, divided slides from the main body, added finger hook on top, resized bore at the mouthpiece end, added multiple backdrops 5/28/2022: Pulled mouthpiece out, added "thing" near mouthpiece(What's its name?)