I wish you very good luck with that... And do not like your chances at all !
When I got my first Escort (about 1989) I noticed this pipe was in the diagrams and missing, so I got a brand new one from Ford to fit to it...
It lasted no more than about a year before it fell apart with the heat. It was a mixture of silver paper type stuff over concertinated cardboard type stuff and did not seem to cope weel with heat (go figure why!). I have never seen one in wrecking/owning about 20 2Lt Escorts over the last 20 odd years.
You may be lucky and find one from a Ford dealer, or able to adapt one from another type of car, but my experience with it was that it did nothing and made no difference to the cold starting in the mornings (Even thought the vacume port switch in the air cleaner did work)