There've been a lot of sources of 60s Space Race information available on the web over the years; sadly, not all of them are still with us today. Luckily, I made copies of many of these sites over the years (mainly when I had a lower-bandwith Internet connection and it was slow to re-download the same documents over and over). Since they were still sitting on my hard drive, they were fulfilling their intended purpose (giving me easy access to these documents), but not doing anyone else any good.
So, I created this site as a companion to http://heroicrelics.org to serve as a publicly-available repository for many of these lost sites. This list will undoubtedly grow in the future, but for now, here is what I've uploaded: