Yes that's the one, I don't know how far off it is from the A420? I saw a post on FB suggesting they had a Mk4 in stock, Not sure on the model/spec as there's more than 1 different dash in the MK4 Escort.
Don't forget Ford Breakers in Cheney Manor, It's worth asking them to allow you to look round and you'll find some good stuff. Granted they don't have as much stuff as they did 10 years ago.
I'm sure you'd update this thread with anything you'd need. I don't have much stuff left from my build and spares.
Ive had my Escort for 10 1/2 years and the Fiesta for 3 years. I'll be driving the Escort from 1st June after just shy of 2 years on SORN, I'm not sure when I'll have the Fiesta out again... I keep thinking of letting it go, But its a nice example with plenty of history.