Can anyone tell me the 'Technical' names of these two parts please?

The part which the Hub attaches to:

[img]http://i927.photobucket.com/albums/ad115/james132stomp/DSCF8945_zpsd3a7f24f.jpg[/img]

[img]http://i927.photobucket.com/albums/ad115/james132stomp/DSCF8963_zpsd75f8549.jpg[/img]

[img]http://i927.photobucket.com/albums/ad115/james132stomp/HFQdFl0SOABUHhkITQwbARxEX1lGTUMIAgNCUQ4Ia1QXVgMN_zps91525c1e.gif[/img]

On the above diagram part numbers 4A493 and 5500A << Lower trailing arm?

Thanks.

the first one is the control blade trailing arm with the front upper rear trailing arm bush the second part is the rear upper arm neither being particularly cheap

Dose £80 delivered sound a good price for the parts mentioned above?

Thanks

thats a pretty fair price the control blade trailing arm alone was around that price