Your Unix support files for the agent are located on the install set of the 10.5 software <install set path>\CCS_DataCollection\Support_Installs\bv_Control_for_UNIX
Inside of that directory you will find the Agent software for each Unix type. There is also a ReadMe.TXT that should you look at it as it has good instructions.
Also use the bv-control for Unix getting started guide (also found in <install set>\Documentation\Manuals ) and look over chapter four and five .
Chapter 8 talks about uinstalling the unix agent if you need that information as well.