But rather than paying the £900
Based on the discussions here I though we would post the parts details of the part here. They modified and fitted the following.
PG569K Middle Box 206 2.0
Fitted by Discount Tyres and Exhauses in Hemel Hempstead, who have always been excellent for both tyres and the like.
The alternative was Top Gear in Aylesbury who would have custom made pipework to fit at (irrc) £200 ish.
The 206 CC was one fo the first in the UK, at almost 3 years old and 60K miles.
Hope this helps for the future.