An alternative to the suggestions made thus far would be to create a networked file system (visible to all intending using machines) and install the module therein - creating access to the external library, on those machines, via $PERl5LIB.

Self-evidently this has its drawbacks - not the least of which is the reliance on the network remaining functional - but, IMO, in most cases, the benefits far outweigh the drawbacks - the most fundamental of which is the disproportionately large maintenance overhead involved in maintaining multiple copies of the same source.