^^I checked a few websites, and it seems most don't even list that part # or only list it for the mk5/6. Other aftermarket clutch brands offer either the LuK or Sachs TOB, both with plastic parts.
The only websites I see including that specific TOB with the kit are from the UK (one says "Now including kit specific" TOB, as if they were previously selling the kit with the plastic part). On Sach's own website, they do not sell the clutch kit with the TOB, however, that is the TOB that is available separately.
Mine was installed with the bearing FCP provided. I guess I'll just have to see what happens. It wasn't fun when the OEM one failed.