Most people reuse the same ear, but now you can have variations. Each ear is of a different construction and each ear has a different design.
Included is a 3dsmax9 file and a export to a .3ds file so you can easily import these ears into other 3d programs.
The rendered objects have meshsmooth applied. Each ear is made with quad poly's in mind so these ears are easy to adjust and modify.
One last note, each ear comes from various heads I have for sale so check'em out.