The cheapest option will be the ebay route, if you can find somebody to get it for you (I assume for whatever reason you don't have an ebay account) This is the option I went for when replacing the stereo in my Mondeo, much like the one suggested by Shengis, I got one with the ISO lead and ford stereo removal tools etc. and it worked out about half the price of anywhere else. You will need the ISO lead as your Ford stereo won't have the industry standard connector.
However, if you really do just want the fascia, I've found one for
£12.95 delivered here.