Hi Hal,
There is only the details of the cult of Kab Tolat Solf in the MRQI version of the Cults of Glorantha, however this covers both the Marazi Amazon and Teshnan versions of the cult and is pretty playable. However there are other cults that could be used as a basis for the Teshnan deites, Lodril and Yelm come to mind.
Simon