Ah, I think I understand now. And, no you didn’t misunderstand me, I had assumed that these were new organizations using the name of the old ones, I didn’t realize SDS had not gone away after the Vietnam war. :)
Keep an eye on the New Left Review:
http://www.newleftreview.org
The left/libs have been kept plugged into each other since the 60s with that mag. If that ever goes away, then they are done.