Made this one: http://www.kde-look.org/content/show.php?content=54547 into a square launch button. Takes up less room on the kicker.
Uncompress to /home/USERNAME/.kde/share/apps/kicker/pixmaps
Create the folder /pixmaps if it does not exist. You can also put it into /usr/share/apps/kicker/pixmaps if you want to change it system wide. Suggest backing up old /pixmaps folder before playng ;).