Ok, so I have an SW20, but I am currently going through the same replacements as yourself, as I have lots of knocking and rattling going on as well.
I have replaced the rack end, front tie rods, ball joints.......I had the suspension inspected by Pedders and they said that the entire suspension was in excellent condition, including the bushes, but the only thing they couldn't check was the shockie/strut mounts.
I have just ordered new mounts all round, so I'll let you know if it gets rid of the noise once they are installed.........hopefully in a couple of weeks.
Cheers, M