Ben,
It isn't the same as a fiesta for the 1.7 however it is common across some other models, namely Galaxy, Mondeo & Scorpio.. I think the part number is 93BB-12B579-BA (Other ref: AFH60-02A).
You can get a brand new one for £50 (£35+P&P!) here:
http://www.autotekelectronics.com/publi" onclick="window.open(this.href);return false; ... 3076&img=3