I have found this bajonett-replacement for Tevidon prime lenses on Ebay:
http://www.ebay.com/itm/Zeiss-Tevidon-C-Mount-Adapter-Mount-/251263450304?_trksid=p2047675.m1982&_trkparms=aid%3D333005%26algo%3DRIC.FIT%26ao%3D1%26asc%3D177%26meid%3D7420819031957811323%26pid%3D100009%26prg%3D1088%26rk%3D1%26sd%3D370791912272%26
Has anyone tried this yet?