Hi,
I have got the same problem, I have been looking for ages and just found this; http://www.priracing.com/product.php/3335/291/is200---is300-rear-hub-knuckle-bushes-coming-soon-
I have put my name down for one, I emailed to ask for a price but they could only say between £50-60. I suppose it's cheaper than a hub and bearing! They did say its not a normal bush its a Pillow ball joint so it allows the lower arm to move which is the reason for the price.
I will post an update when they arrive and are fitted.
