Been away, better late than never? Just guessing here, don't really know, maybe Part #8, "Guide Bush Repair Kit"? (6 is the guide bolt, 7 is the dust plug) Allows caliper to "comply" to rotor variations? Worn FCABs are common enough that they would have called them as such?
Control arm bushes also known as brake basied bushes. Common problem about £40 plus hour labour to fit powerflex.If you can move your wheel horizontaly from front to back than that's a classic sign of the bushes gone .