Running VeSys Harness Version 2008.2 SP0908.5
I did some more investigation and have found out that the Harness XC component database is at a different version that the VeSys Classic database so the parts will never appear because they dont exist in the Harness XC database!!
For reference, there is a section in the DSI file that lists these additional components:
! Harness extra node components
There should still be an option in VeSys to refresh all of the connectors to include the mandatory parts that may have been added in a newer version of a database so I will raise an IDEA for this.