Does anyone know if the original (pre-2015) source code of the wiki software is available anywhere? It once was at [1], but that link has long gone. [2] still

Does anyone know if the original (pre-2015) source code of the wiki software is available anywhere? It once was at [1], but that link has long gone. [2] still links to it. [1]: http://c2.com/cgi/hp?WikiInHyperPerl http://c2.com/cgi/hp?WikiInHyperPerl [2]: http://wiki.c2.com/?WikiBase http://wiki.c2.com/?WikiBase