identify cis-elements in co-regulated genes

Hi, there

I found 5 C. elegans genes co-regulated under some treatment.
Now I 'd like to analyze cis-elements in these 5 co-regulated genes and identify the common TFs that might be involved.

I am looking for something like this http://dire.dcode.org/ but they don’t have the database for the worms.

Could somebody give me some suggestions? Thanks a lot.