Where to get PCAnywhere 12.5 build 525

Where/how can I get hold of build 525 of PCAnywhere 12.5? I currently have build 486.

I do not want to go to SP4 or later due to the lack of backwards compatibility. The updates to build 525 are no longer available on LiveUpdate and the relevant Symantec suport articles that would have a manual installer for this specific build have had the attachements removed.

Surely this is available from somewhere?