Also, Debian has archives of old releases. You might want to try your luck there.
A quick look found https://archive.debian.org/debian/dists/Debian-0.93R6/source... and https://archive.debian.org/debian/dists/buzz/main/source/bas... but nothing earlier. (Amusingly the nearby diff says the sources came from "prep.ai.mit.edu:/pub/gnu/fileutils-3.12.tar.gz" in the "haven't heard that name in a long time" vein...)
alt Hacker News
A quick look found https://archive.debian.org/debian/dists/Debian-0.93R6/source... and https://archive.debian.org/debian/dists/buzz/main/source/bas... but nothing earlier. (Amusingly the nearby diff says the sources came from "prep.ai.mit.edu:/pub/gnu/fileutils-3.12.tar.gz" in the "haven't heard that name in a long time" vein...)