Are any of these machine readable? As long as I don't have to transcribe them by hand I would enjoy looking at them!
Even the better players were becoming so dependent on them, that it was detracting from the music, so I went cold turkey and learned the tunes.
An app called "iRealPro" has chord changes in a strange format, and somebody once created a Python library to decode it.
There was once a book called "pocket changes" with just chord changes, and I think it was converted to text format, but can't find it anywhere online. The changes are an outgrowth of a quirk in the copyright law, where the melody and words can be copyrighted, but not the harmony.
Wish I could be of more help.
Some of the chord charts are machine readable (available as just plain text), while others are images, but looks like all/almost all of them are available as MIDI as well.