New on AE Scripts is ft-Cubic Lens Distortion, a Pixel Bender by Francois Tarlier, who's been actively releasing free filters this year. It's a port of the SynthEyes Lens Distortion Algorithm for matchmoving, with a Cubic Distort parameter for exact matching. The built-in filter CC Lens Distort doesn't seem to have a Cubic Distort parameter.
This is version 4.0 of this Pixel Bender; for background on previous versions see Cubic Lens Distortion filter for After Effects + Chromatic Aberration. Here's the AE Scripts demo: