Fh13 euro 5 exhaust

LRM:
We run a 2010 fh13 460 euro 5, not a a lot of trouble with our volvos in the past but this one is the runt of the litter, it seems it now needs an exhaust because it has collapsed inside, we have no turbo boost and it’s down to 7 mpg, has anyone fitted an aftermarket product or came up with another plan, I found some recon ones on ebay from Poland but they’d seem too good to be true at £650…

All advice/opinions gratefully received…

Lrm

AD-Blue system emulator, then just cut it open, empty it and weld back together.