Need an exhaust fix.
 

Hello.
I don't know how unusual this problem is, or not.
My middle pipe and main silencer are in relatively good condition, as a whole. But the stem from the silencer, where it goes into the middle pipe (at the stopper) has rotted away. I would like to know if there is a anything out there, like a coupling, I can use to bridge the gap and salvage the system, before dishing out for a new middle pipe and silencer.

Regards.
Angelo