If you need a carb, I may be able to source one from my local Cit garages - I have two in the area, run by enthusiasts.
My 4th Cit, and 3rd BX, goes through MoT today. It's new to us, a very, very good TZD estate. I'm very excited. Looked after by a highly skilled, slightly obsessive engineer for the last 6 years, who passed it on to us for £100. It has A/C and leather seats as well!