My current muffler/catalytic pipes have been welded a few times and one of the welds recently split open (the
one where muffler/cat pipe come together just behind flat support plate). Spot where pipe is welded to back of cat still looks good.
I was disappointed to search three of the MVS sponsors and not find a catalytic converter for the 1997 850 LPT.
This seems like a bad sign.
I haven't checked with dealer yet but I expect the cost for cat from dealer might be more than my car is worth.
My regular guy doesn't recommend welding rusted twenty year old pipes/cat. He recommends buying a new car.

It may be time, especially if parts are not longer readily available, but I thought I'd check here first.
Thanks