I don't know about yours but about four years ago mine (on a 2006 TD5 model) started to seize and I looked into whether you could buy the components separately. I couldn't find the components for sale individually so I ended up buying the whole thing including the universal joints, rubber joint and sliding section. I don't recall it being terribly expensive.
I expect the fire will have boiled all the grease out of the universal joints as well. Mine doesn't appear to have any means of greasing the bearings so they're sealed for life.