I found a bunch of them here: ftp://ftp.ne.jp
CVS brows of the following:
I didn’t know that GNUmake 2.9 and prior was actually part of binutils. I guess at some point I’ll build the older ones on 4.2 BSD to round out the experience.
And I don’t know where to find Emacs 18.41 and going further back. Although I did find emacs1855.taz a DECUS (Digital Equipment Computer Users’ Society) image from late 1989.