You can do that by running the javadoc:jar and sources:jar goals before repository:bundle-create:
mvn sources:jar javadoc:jar repository:bundle-create
You can manually add the artifact to your local repository, creating a POM and optionally adding source and javadoc jars. Then you can run mvn repository:bundle-pack that will prompt you for groupId, artifactId and version and will generate a bundle that you can use for an upload request.