You may be looking for the Blake's 7 zine of fiction called Cephlon One.
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When this newsletter folded in December 1996, it had no formal, wide-spread successor.Joyce Bowen wrote in October 1996:
THE DECLINE IN B7 FANDOM IN AMERICA: If American fanzines and newsletters keep on dropping by the wayside, pretty soon our English connections will be all we have left. Graham seems to think CEPHLON now will not be continued by another editor. Do you realize that unless someone decides to become CEPHLON's editor that after December there will not be ONE B7 newsletter left In America??? Phooey. And, no, I can't do it. I just don't have the required skills. 
Bowen did go on to create a very informal, small-run info zine called Orac's Oddities.
- from Rallying Call #19