Centre silencer

Having finally got fed up with the noise from lack of middle box,I have tried to obtain one from many sources (not Renault yet!).

Not one of the regular exhaust fitters has got back to me after repeated enquiries and some can't supply.

Anyone know where to source one from -most specialists do just the whole system.
 
Have decided not to change the straight-through pipe - I have put sound insulation on boot floor /under the rear seats and (most importantly) on the underside of the parcel shelf which on its own has reduced the decibel level quite dramatically.

Job done!