I almost forgot, Cusco have one too and I like the THK balljoint they use.
The Superpro's version is beefy as I had one once. But I did have some issues with it.
AVO Australia website:
it is the only item that I could not find in any catalogue. It is part of the overal S206 chassis, but what the effect should be isn’t made clear by STi.What do the longer S206 bolts do? They allow you to torque them more?