Olaf removed Percolate from PD some years ago for personal reasons. Perhaps someone can privately offer you the code, but it is not publicly available any longer.
d.
mbutubuntu wrote:
(http://www.music.columbia.edu/PeRColate/) the link to the PD porting of Percolate doesn't work (http://www.akustische-kunst.de/puredata/percolate.html)!!!!