Download FMS 4.5

For many years my company has been using FMS 4.5.  It does what we need and we've seen no reason make any changes.  That being said, we now would like to upgrade the hardware that is running the server and we need to install FMS 4.5 onto a new machine.  I found a page to download older versions of Adobe Media Server, but that page does not have any information about versions prior to AMS 5.  Please see the link below.

Patches, release notes, and updates for all AMS releases

Is it possible to download an installer for FMS 4.5 from the Adobe site?  Or do I need to look elsewhere?

Thanks.