i think you might find its the lower suspension arm bush's that's gone, no bush available,you will have to get the full arm £116 each from Lexus, i got one of find a part.com but do be careful there not all the same,one is more bent than the other and a bit shorter.(mine is the longer straighter one 2001 car) cost me £85 secound hand for the lower arm(RRP£116) and the tie bar with ball joint attached.(RRP£140) hence to say i have the shorter more bent one for sale now because i got the wrong one first time round. SILLY OLD ME!! .but its all sorted now YAHOO!!!! :D
REAL EASY JOB. remove the 3 bolts from the arm, 2 small bolts in bracket boll joint end of arm, 2 small bolts along the same brackets bar towards the centre of the car,just to give a bit of free play in the bracket, remove only 2 of the steering rack bolts if your only doing one side,again this is only to give a bit of free play fro the arm to move, no need to mess about taking all the plastic belly guard's of there is enough play to do the job with ease.
some pic's of the two arm's