Just a quick update on where I am, for those who may follow downstream -

DPM performance can provide at - £655.00 inc VAT and delivery
Details of equipment required for A4 Avant 2.0TDI 143 (08 on) confirmed with Bilstein as -


B12 Pro-Kit -

46-183323

Fitting Position Front Axle, Lowering ca. 35 mm, to axle load 1105 kg;

Fitting Position Rear Axle, Lowering ca. 30 mm, to axle load 1160 kg, for vehicles without ride height control;

Fitting - Garage quote about 4'ish hours to fit.+ alignment of rear wheels and check of front (they cannot be realigned with out changing bolts.)