Some progress on the shifter front.
Adapter Plate - 5mm x 150mm flat bar, the larger holes are 14mm diameter, the smaller are 5mm tapped with an m6 thread. The bolts from the MTX selector go into the threads. The adapter fits over studs in the Fiesta which has nuts to hold it down.
However, we have an issue. The right selector cable is much higher than the IB5 selector, and impinges the selector console at two locations - where the tray for the shifter consoledips down, and the shifter pin itself appears to touch the shifter surround.
Luke