Nslookup in Zenworks Imaging Engine

I think I posted this previously on the wrong forum. We are running
zenworks on Netware.
In the previous version of ZenImaging I wrote custom script using command
"host" for nslookup and resolving ip to hostname and used the resolved
name in "zisedit". In the new version I did not find any command that can
resolve IP address into hostname. What should I do? I am ready to add the
command and make a new initrd, but where can I find the proper version of
"host" or "nslookup"? Why did they take out the most basic commands?