These are from the 90's, but there are a bunch of "Track Record" newsletters at archive.com that may be worth reading through.
https://web.archive.org/web/20041011000259/http://www.internationalbigfootsociety.com/html/the_track_record.php
A bunch of "Track Record" encounters are in the John Green database, and highlighted on this forum in the John Green SSR section.
You can go to https://bigfootforums.com/forum/160-john-greens-sightings-database/ and enter the search term track.php to find them.