Another good catch.
I just bought both the rad and the clutch "pressure plate". Per the Volvo part number given in their listing (271265), this would actually be a complete clutch kit with pressure plate, driven plate, and both release and pilot bearings.
We'll see what's really in the box when it gets here but at that price I was too tempted to find out. Same thing with the rad.
I don't actually need either of these parts, so if anyone else here does, contact me, they'll be available for anyone in this group, same cost I paid for them.