Yeah it could be repaired buy anyone who can get it re welded, i did it to mine but i got students to do it at work, (work in a college) and they forgot to repackage it so its silly loud...pretty much zero silenceing atall, just pipe haha.
Yeah the baffles collapsed and all the wadding blew out the back, and the bit left rattled around in the chamber of the b pipe like a cow bell. Was highly annoying. Once i got that cuf out and removed and effectively making it unsilenced bpipe it sounded awesome, really noticeable gargling on overrun with a few pops...brilliant fun...then the backbox did the same.
I will get it re done properly as a nostalgic thing,...came over on the car and was quite rare, but since the students repaired it i got a flange remade so it mates to oem and haven't gone back to them to open it up and re pack it again. I will do one day. Bought a Toda instead for a change.