what i'd suggest is for even half the price you paid is get the 3" turbo back ebay special, keep the exhaust you had "proffesionally fitted" and just swap them over when it comes to MOT time, thats obvioulsy once you've got some more fundage obviously otherwise at least you got it sorted, also have a shop about for bushes, DPM and Awesome do deals on these if you ask nicely and then its just a case of taking it to a vag specialist or seeing if theres any VW clubs in your local area with discounts at local garages and get it done there?