Yes,
FCP_SMT_079_HSSE_Pro.vstsound
FCP_SMT_083_HSSE_S90.vstsound
FCP_SMT_085_HSSE_SR_OneSoundzSilver.vstsound
FCP_SMT_087_HSSE_VST_Expression.vstsound
are part of the Cubase x ‘Additional Content’. They can be found in the various Cubase installer ‘Additional Content >> VST Sound’ folder.