(Update: I wrote this post originally after CF11 came out, but it applies as well and still now that CF2018 has come out, so I have changed the references to that from here on.)
Find CF installers, updaters, and docs for past several releases
The good news is that if one wants to find ANY installers for most ANY version of CF, they can be found on an external repository setup by Gavin Pickin (and added to by myself and others, to include updates, hotfixes, and docs):
Gavin Pickin's CFML Repo
The name, CFMLRepo, may confuse some if they presume it's a repo of CFML. It's not. What it is is that originally it did originally have only CF installers (and updates, etc.) but then some contributed installers for Lucee and such, so he chose the more "generic" name.
(There used to be a longer and hard-to-remember URL, when I posted this originally in 2014, and I had created a shortened url, http://bit.ly/cfdownloads. It's now not "shorter", so I leave this here for posterity.)
Thanks so much to Gavin for creating the repo, and to him and others for maintaining it. Let's hope it remains a viable solution to find downloads for years to come.