Jon, I'm very glad that you have decided to buy a Real Citroen.
That'll stop GSF deleting parts! Seriously though, if there are parts you need or any technical info that you don't already have (as if!)
please be in touch. Good luck with it.
PS: best tip for the BX TD.
Take off the intercooler, Pressure wash it gently from the underside.
Air now flows through the intercooler.
It makes a hell of a difference.