ForTwo Brabus exhaust suggestions?

[tolsen]

That is a toroidal expansion joint. Commonly used in exhausts. Widely available.

[JohnnyBoy]

I think it is repairable, I am going to investigate tomorrow (Bank Holiday today). Photos attached. Thanks for your advice!

[10:45PM]

Is what you've got left still repairable?
Got any pics?

http://www.ebay.co.uk/itm/like/252117746887?lpid=122&googleloc=9045950&poi=&campaignid=207297426&device=t&adgroupid=13585920426&rlsatarget=pla-131843275746&adtype=pla&crdt=0&ul_ref=http%253A%252F%252Frover.ebay.com%252Frover%252F1%252F710-134428-41853-0%252F2%253Fmtid%253D1673%2526kwid%253D1%2526crlp%253D50600204586_563391%2526itemid%253D252117746887%2526targetid%253D131843275746%2526rpc%253D0.13%2526rpc_upld_id%253D70746%2526device%253Dt%2526mpre%253Dhttp%25253a%25252f%25252fwww.ebay.co.uk%25252fitm%25252flike%25252f252117746887%25253flpid%25253d122%252526chn%25253Dps%2526adtype%253Dpla%2526googleloc%253D9045950%2526poi%253D%2526campaignid%253D207297426%2526adgroupid%253D13585920426%2526rlsatarget%253Dpla-131843275746%2526gclid%253DCKDcse6bgM0CFesV0wodUw8HAA%2526srcrot%253D710-134428-41853-0%2526rvr_id%253D1037516636150&lpid=122&chn=ps&googleloc=9045950&poi=&campaignid=207297426&device=t&adgroupid=13585920426&rlsatarget=pla-131843275746&adtype=pla&crdt=0&ul_ref=http%253A%252F%252Frover.ebay.com%252Frover%252F1%252F710-134428-41853-0%252F2%253Fmtid%253D1673%2526kwid%253D1%2526crlp%253D50600204586_563391%2526itemid%253D252117746887%2526targetid%253D131843275746%2526rpc%253D0.13%2526rpc_upld_id%253D70746%2526device%253Dt%2526mpre%253Dhttp%25253a%25252f%25252fwww.ebay.co.uk%25252fitm%25252flike%25252f252117746887%25253flpid%25253d122%252526chn%25253Dps%2526adtype%253Dpla%2526googleloc%253D9045950%2526poi%253D%2526campaignid%253D207297426%2526adgroupid%253D13585920426%2526rlsatarget%253Dpla-131843275746%2526gclid%253DCKDcse6bgM0CFesV0wodUw8HAA%2526srcrot%253D710-134428-41853-0%2526rvr_id%253D1037516636150&ul_noapp=true

[JohnnyBoy]

I have a ForTwo Brabus (2011 on a 60 plate) and the flexible hose between the CAT and the exhaust has broken. As the genuine Smart part is very expensive, I wonder if anyone has any recommendations for a non-Smart replacement?
It was a complete bugger to get off. Apart from having to take half the car apart to get at it (well, it felt like that!) I could not undo either of the bolts holding it to the CAT, and eventually had to sheer them using a chisel and brute force ignorance. Not a job for the feint hearted!
Also, as I have managed to remove the welded retained bolts on the CAT bracket, can anyone suggest what type of nuts and bolts I should use? In the olden days (I am of a "certain age") when I were a lad, exhausts always seemed to use steel studs and brass nuts. Anyone know why? Can you use stainless steel?
Thanks for any help and advice...