I found this post when I was looking into fitting a bigger intercooler, it at least gives you the size of the unit(see sig) but not the inlet size.
Hope it helps.
http://www.fordmondeo.org/forum/showtopic.php?tid/771517/post/1449637/#1449637
Hope it helps.
http://www.fordmondeo.org/forum/showtopic.php?tid/771517/post/1449637/#1449637