The duplicator?
http://forum.blockland.us/index.php?topic=206615.0
The exact same thing I linked him to only on rtb
except it's notduplicator and duplorcator are different
Duplicator on RTB got replaced by the duplorcatorLook at the changelog
You'll find that for some reason you can't update the name on RTB for whatever reason.
Also on the topic you posted it is still called Tool_Duplicator