A fair approximation of horns are simply: a path spiraling towards the tip on the surface of a cone, and a "ribbed" profile, spiraling along the path. This is very easy to parameterize (check out the variables on line 7: you want the diameter at the base, the diameter of the cone, the height of the cone, a number of ribs, and counts for how many times we go around the cone before getting to the tip, and how many times the ribs twist around the horn.

I chose solidpython just for simplicity and clarity of code.

so edit line 7, run the script, and open the resulting .scad file in openSCAD and check if you like what you see!

I'm happy to take questions, comments, and suggestions!