I've been after a set of genuine Ford mudflap's a while now but because Microcat is so vague I couldn't work out which was the correct set.
Anyway with the help of a few Escos owners and trevor at Fordpartsuk.com I now have the part number

Interesting there are a set of each on ebay at the moment.
http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWA%3AIT&rd=1
http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWA%3AIT&rd=1

Check out the pictures from ebay next to each other:-
Fronts

Rears


They are the one and the same! just in different positions lol

The funny thing is that there are no 'Escort Cosworth' mudflaps these are universal mudflaps and the fronts and rears are the same finis 1052581. They are availible in abundance from Ford at £21 retail a set.

Wonder how much they will get bid over the retail?