MAPICS 2.0 (S/36) - Source Needed for AMZ00

A fellow consultant needs the source for S/36 MAPICS 2.0 module AMZ00.
He is modifying their application for Y2k, and does not have source for
this particular module. Evidently, this module returns an error when
year = 00. Rest of software source that needs modification is available.
Vendor no longer supports this release, and has not been able to supply
the code.

Any suggestions on obtaining this code, short of decompiling?

Thanks,
Bob

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