id guess they mean front arm, rear bushes, in wish case you can get a new lower arm with bushes and ball joints for £15 each, easy job to do as long as youve got a tool for splitting the ball joint from the hub,,
42216 FR TR CON ARM
IBIZA ALL 13.75 Add
42217 FR TR CON ARM+BUSHES
IBIZA 92> 19.50 Add