Link still works, just a different part.
SHAFT and JOINT ASSY, Focus, Auto Trans, Right 00-04 $197.37
Oh, wait, this might be harder than it looks. That website tends to forget about the 2.3l before 2005, and I'm not sure if the ATX changed exterior wise from a Zetec. You might have to look into a 2005 part.
SHAFT and JOINT ASSY, Focus, Auto Trans, Right, Coupe, Hatchback 05-06 $192.34