Squeaky suspension

i have developed a constant squeak / chirping sound from my NS suspension, pretty much on every undulation on the road over 10mm, my dealer is telling me that audi have said its a rubber in the rear suspension and its normal so they wont look at it, its damn annoying...

its getting louder and more common (ir happens near constantly on our wonderful roads....), sounds a bit like a bicycle pump with your finger over most of the hole

its odd as the tech said its a common fault with the rear of A3s but you only hear it when the front is compressed, also i thought the RS3 had a modified rear end to the rest of the A3s (i seem to remember they saying it was from the new car at launch) it certainly looked different to the S3 to a layman when i photographed them both