If you're searching for old versions of modules, http://backpan.cpan.org keeps everything that once was on CPAN. perlre tells me that \p{PROP} is a fancy name for a character class, and I guess that \p{IsWord} is identical to \w, so you could try to patch the module to use \w wherever \p{IsWord} is used and then see whether the tests still pass. Maybe \p{IsWord} only means [a-z] plus all those diacritics, but English won't have them, so maybe you're lucky.