Go to a machine that has internet connections and is the same platform as you are on. Use PPM to download (but not install)
. Move them to your machine and install them. You may need to set your PPM repository to some directory at
which has good windows binaries of DBI stuff. You'll have to set some environment variables, read the DBD::Oracle docs and check the archives of dbi-users@perl.org for details. Good luck!