How does one obtain an old version of these utilities? Do you mean you just have an old mac running old OS X somewhere?
https://support.apple.com/kb/DL1536?locale=en_US
You will need to manually unpack it via pkgutil/tar. However, it will won't run under 10.12 since it requires an older version (Mountain Lion) of Apple80211.framework. Assuming you have a copy of the older framework, you can make it work.
Fortunately, someone has already done this work: