Mixamo Animation Request.... If Possible

any actual assets added to Mixamo will have to be under the same licence i.e, Adobe does not own it so unless one of the staff does it in their lunch hour

Depending on the type of animation software you're using, you can take tracks of animation from different characters and repurpose them to work together to get a new custom animation.

Have you looked at "Listening to Music"?  It might be a great starting place for some saxaphone animation.

"Ask" away!  You never know what might be added.  Adobe just added new fbx sdk recently!

you can ask but Adobe is not going to add anything to Mixamo