You can load the xs extension using dlopen (or whatever windows has to realize that functionality - glib has g_module_open which allows to specify if symbols should be resolved lazily or not, so there has to be a way to do that on win32) and tell it to resolve all symbols non-lazily. If that fails it's probably due to some removed library.
Also I wonder why those extensions are linked against libperl. I thought those are loaded from perl/libperl. At least on my unix system I couldn't find a single extension linked to libperl.