On my '05 Pacifica it is not all one piece, I'm almost positive. But the reason some websites specify the joint in question as usable for an '05
maybe be because they changed the control arm design in '05. Or I was also thinking that maybe it is not removal, even though mine seems to look like it is. Maybe they welded or glued it, I don't know.
Cheapest place I found to get the ball joints is
Auto Parts Tomorrow | ACDelco, Bendix Brakes, Denso, Motorcraft and more
They are $17 a piece. So I got two and some front brake pads for $55 shipped because shipping was free over $50.
Most websites you don't even get two Moog ball joints shipped for $55.