repressor assay vector

I am wondering if a plasmid exists to test whether or not a DNA sequence element has repressor activity in C. elegans.
For example, the delta-pes-10 enhancer assay vector pPD97.78 is available from the Fire vector kit, but I haven’t been able to find an equivalent repressor assay vector.
If you’re aware of such a vector, please let me know - thanks very much!