I'd personally recommend not submitting the module to CPAN unless you can get the agreement of the original author.

There are many reasons that that may not have put the module there themselves- maybe they don't view it as good code so don't want it public, possibly they were working for a company who's contract precludes releasing things for open source, they may just not subscribe to the CPAN ethos, or the code may simply be under a non-compatible license.

Whilst it would be a shame to lose what sounds like a potentially useful module it would be a greater pity were the author to be annoyed about the distribution of his work, or the CPAN to face any potential legal problems.