Looks like you can still access Remote Server Administration Tools for Windows 7 with Service Pack 1 (SP1) page in Download Center (http://www.microsoft.com/en-us/download/details.aspx?id=7887) via web.archive.org,
and download either Windows6.1-KB958830-x86-RefreshPkg.msu or Windows6.1-KB958830-x64-RefreshPkg.msu installer version.