You need to fetch the latest perl source (including developers
releases). With some probability it is located in
- http://www.cpan.org/src/5.0
- http://www.cpan.org/src/5.0/unsupported
+ http://www.cpan.org/src/
+ http://www.cpan.org/src/unsupported
If not, you may need to dig in the indices to find it in the directory
of the current maintainer.