I've got a full stainless steel de-cat exhaust system and a Raceland stainless steel manifold for sale that fits a Polo GTI 6N2. Kit also comes with decent clamps to hold all the sections together (not pictured). The twin pipe seen in the photo has been replaced with a single one (personal preference).
The girlfriend says it's just too darn loud so I had to take it off my car so if you have a partner with sensitive ears this may not be for you. That aside, all this can be yours for £150 (girlfriend not included)
Viewing or collection can be done in Barnet, North London.