Binaries for EOL version?

[Ron <ronljohnsonjr@xxxxxxxxx>]

    I might need to install amcheck on a RHEL 6 server running Pg
    9.6.24.  (Yes, I know... don't say it.)
    
    However, I don't see anything older than 11 in
    https://yum.postgresql.org.  Example:
    https://yum.postgresql.org/11/redhat/rhel-6-x86_64/repoview/
    
    Have the binaries been deleted or are they in some publicly
    available, but not publicized, archive?

--
Born in Arizona, moved to Babylonia.