batch-capable zip OS/400 freeware

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I'm looking for OS/400 freeware to zip IFS files and can run in batch mode.
Have looked at GZIP and ZLIB programs for OS/400 but they don't handle
requirements for batch
Also looked at IBM developer tools

Need:

callable from ILE CL/RPG with return code parameter ( or OS400 messaging)
no interactive requirements (printf scanf etc)
v. basic zip functions (just name of zip file and name of file(s) to add)
prefer multiple files in zip file
compatible to PC zip pgms
preferably an unzip function (pgm or option)
preferably compatible with V4R3 upwards

Rod Orr



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