Nice topic Bradders, I see you stalk eBay as much as I do
Here are my findings.
Plenum spacer from Murica, £82'ish quid:
http://www.ebay.co.uk/itm/131541129297
True dual exhaust, HKS copy from Poland. £400
http://www.ebay.co.uk/itm/201318825865
Carbon Fiber lip for OEM bumper from HongKong.£78
http://www.ebay.co.uk/itm/360979155895
OEM Banana arms (pair) from Murica. £280'ish
http://www.ebay.co.uk/itm/251258354038