Myōan Eisai 明菴栄西 and Ōryō school of Rinzai Zen

In the biography of Myoan Eisai 明菴栄西, I read that he was originally a Tendai monk and founded the Yōjō lineage of Tendai esoteric Buddhism (tendai mikkyō yōjō-ryū 天台密教葉上流) and the Ōryō lineage of Rinzai-Shu, where he taught a mixture of TendaI, Shingon Mikkyo and Zen. I also read that there is a Mikkyo lineage in Rinzai-Shu that's reserved for certain elect masters.

I am now looking for more information about the Yōjō lineage of Tendai-Shu as well as the Ōryō lineage of Rinzai-Shu and where one can still study these teachings today. maybe at Shōfuku-ji 聖福寺, Jufuku-ji 寿福寺 or Kennin-ji 建仁寺 where he lived and taught?

Thank you very much for any information.

sarva mangalam