I found a bunch of them here: ftp://ftp.ne.jp

CVS brows of the following:

• GAS
• GDB
• Binutils

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.