Company called cybox on eBay do stainless exhaust that will bolt straight on.
When I asked them last year they said they could put different tips on etc
Not too sure what they sound like in person but I'm sure I've seen video on YouTube of 75/ZT's with this exhaust on.
http://www.ebay.co.uk/itm/MG-ZT-SALO...M5uJmrAcKFZxUg