I've got a 2010 a3 8p3 sline and have the single exhaust pipe diffuser on it at present but want to change it for the twin pipe black edition rear diffuser ive looked on ebay etc but there rare as f#@£ any one know where I can grab one from and also the 4 criss cross inserts it has can they be swapped from one to the other as when you add up those 4 bits and the diffuser its a bit costly any adeas would help or if a different twin pipe diffuser will fit please let me know ta.