There are some bits and pieces on archive.org and other places.
Unfortunately the completer archives that people had (magtapes etc) got donated to dejanews (which later became google groups) or Google directly. This was about 20 years ago when Google was seen as a safe place to put that stuff.
The archive.org alt.2600.mbox covers only 2002-2013. Maybe after google gets broken up, we'll discover that this data is still preserved, and can be liberated. We can dream.
Unfortunately the completer archives that people had (magtapes etc) got donated to dejanews (which later became google groups) or Google directly. This was about 20 years ago when Google was seen as a safe place to put that stuff.
We know better now