Sockets Namespace not Installed with Delphi 10.3

I've recently taken over maintaining a Legacy application that uses Delphi. More specifically it uses the deprecated Sockets Namespace. I'm currently using Delphi 10.3 and have looked at the help provided here: . However, dclsockets260.bpl does not exist under the /bin directory. I have been unable to find anywhere that this file is available from install from Embarcadero.

Some of the other Delphi applications that I'm maintaining use inetwinsockets. Is this a suitable alternative or should I be trying to get dclsockets working instead?