Hey buddy, I would suggest post on the rsoc forums as there is a guy that works for Ford in the parts department.
His name is stevedohc16v and he has been very helpfull so far with me and giving me finnis codes for parts etc.

Here is the link to the "Finnis Codes" forum

http://bbs.rsownersclub.co.uk/forumdisplay.php?f=27

I would reccomend posting there as he's pretty quick to respond.

Hope this is of some help mate.