Hi,

This looks exactly like my Mondeo V6 one.
Try eBay or scrapyards... I see a lot of them.
As far as I know there is only one kind of 278mm Mondeo V6 caliper.
Some places list two kinds because there are some V6 with 260mm brakes... (post 97 I think)

The V6 calipers are not exactly the same as 4x4 Cosworth ones, similar but not the same. The pads and discs are interchangable.