Service Bus is only needed as a separate package if you don't want to use Connect ID SDKs. Otherwise download the relevant package from "Connect ID SDKs" folder, they all contain the newest version of the Service Bus library.
Release notes of the Service Bus are part of release notes of the main package and can be found here.
Download / Latest
If you need a Service Bus SDK as a separate package, kindly reach out to support.id@fifa.org and we will prepare one for you.