1.1 security fix backports still available?

I have a new client with an app running on 1.1.2 and I’m trying to
verify if his vendor/rails already has the critical security fix from
last August. Unfortunately, the backport patches to earlier 1.1
releases linked from

have moved (or been removed).

It’s probably simple enough to update him to 1.1.6 in the short term,
and get him on 1.2 later, but for right now, I’d rather ensure his code
is secure and schedule the bigger upgrade(s) for later.

Does anyone know where I can find those backport patches? I’ve scoured
Google and much to my surprise, no one seems to have mirrored them.