Here are some simple twisted spiral horns and the OpenSCAN file used to generate and animate them. Adjust the properties in the OpenScan file to make your own variations on the default horns, along with your own animations if so desired.
See animation here: http://makeagif.com/i/THeBFN
Rev. Orig - July 10, 2014 - one way to make a twisted spiral horn like mesh
Rev. A - July 12, 2014 - improved Thingiverse Customizer support
Edit the OpenScan file to adjust these properties:
length=100, //Measurements are in mm
To see animation using your properties, click View|Animate, then set FPS to 30, and Steps to 120 on the animation toolbar and uncomment the line that says :"animate=1;" by erasing the // in front.