This is interesting, i currently cannot find ANY X-Pipe suppliers in the UK for a reputable company. All i find is american sites charging stupid amounts for X-Pipes that i then have to try and get into the UK and probably then pay import tax on (and could get damaged/bent coming all that way)
After spending 3 years worth of my savings on my 2010 M3 and finding the stock exhaust way to quite for my liking (i'm 22 and have a MK2 Focus RS for DD with full Milltec race down pipe, cat-less and none resonated cat-back - i like to hear every pop and bang) i've spotted a little bargain on ebay. Its this exact 'cheap' x-pipe you have all been discussing.
I think its so cheap that i'll take the gamble...
I've got a two poster 4ton ramp and fully kitted out garage so i'll be able to take some much better images!
Worst comes to worst i can always go back to stock and add resonators like this chap on here has.