The turbo went on mine a couple of years back whilst overtaking. Filled the Ogwen Valley with white smoke and spat its innards all over the road, oil included. Managed 300 yards coasting and no more.
Cost £900 to fix as they wouldn’t take the old turbo to recon as there wasn’t much of it left. Being variable-vane turbos, they’re pricey. Sadly, the car was never really the same again, kept having engine management issues and had to take it to Ford as even my local garage admitted defeat. Flogged it on EBay straight after.
Good luck, but it may be worth just getting it to move again and flogging it. Alternatively, you may never hear another peep out of it. It’s a car – who knows!
FWIW, a mate had a Pug 407 with broadly the same engine (Pug and Ford co-developed the HDI/TDCI) – his ate 4 turbos in quick succession…