There are some bargains on ebay at the moment, I've just found this;
http://cgi.ebay.co.uk/EXHAUST-LEOVIN...QQcmdZViewItem
this;
http://cgi.ebay.co.uk/SUZUKI-SV650-C...QQcmdZViewItem
this is what I have, sound great, been through two winters with no signs of weathering
http://cgi.ebay.co.uk/SUZUKI-SV650-S...QQcmdZViewItem
Where abouts in Wigan are you? Need a hand fitting it?