Been looking all over for this one, and I find it now simply as a .desktop file [named netload.desktop].
The content of the file is shown here:
[Desktop Entry] Version=1.0 Encoding=UTF-8 Name=No name Name[en_US]=netload.desktop.txt [Xfce Panel] Type=X-XFCE-PanelPlugin Encoding=UTF-8 Name=Network Monitor Comment=Show network traffic Icon=xfce-mouse X-XFCE-Exec=/usr/lib/xfce4-netload-plugin/xfce4/panel-plugins/xfce4-netload-plugin
