Quick update,
The exhaust I purchased fit like a charm, 58mm Bore, it even came with a complete fitting kit,
2 clamps,
2 gaskets,
1 sleeve
4 nuts and washers,
fitted yesterday, and so far so good, will have to update once I've put a hundred miles on it
Anyone how is interested, this is the ebay item I purchased,
http://www.ebay.co.uk/itm/1822676885...%3AMEBIDX%3AIT
Item number BM90704H
Thanks for your help guys