Where do I find Keplerian elements for the Russian space station Mir or the International Space Station?
Mir is no longer in orbit. Elements for the International Space Station are in the standard bulletins, see above. However, sometimes the ISS orbit changes more frequently than the weekly bulletins, so you might want to check another site (such as NASA) for fresh elements. You may also wish to subscribe to the SAREX mailing list. See the AMSAT Mailing Lists page for details. Keplerian elements for the ISS are currently posted to that mailing list every day.