Did a bit of digging - the archive on Aminet CD 12 appears to be the same as what's on Aminet today, so it's likely the file was corrupted before/during the original upload to Aminet in March 1996.
ParM 6.02 is dated July 1995, however. So if you can find a file library from between July 1995 and March 1996 maybe it contains an intact, non-Aminet version of the file. I've quickly checked the CDs for Fresh Fish Vol. 10, Gold Fish Vol. 3, Meeting Pearls II, and Meeting Pearls III and it's not there (although it's possible I missed it). Not sure who else might have been putting out CDs with utilities during that window...
Source code for an older version is on
Fish Disk 419.