vw made them back in the day.n not too many sets up for sale. one or 2 come up for sale every 5 years.
they go from 250 and up plus shipping for them.
thule also makes one set-up but not as nice as the OEM.
the OEM rack takes attachments like a mk4 car. they slide into the racks...









but before I got that I looked at the new Yakima Q towers, and they have fit kits to fit the passats and they are really nice racks too, but annoyingly u end up having to pa out the butt for them, mine as it sits with one bike tray cost me $100 