Following my visit to Mulfab on Saturday I did a bit more investigation on the web. I've established that the Mondeo sump has a thinner flange, used with a composite spacer gasket. The Morgan sump has a thicker flange with a cast in groove which takes a simple rubber seal. My conclusion to all this is that the Morgan Sump is an Escape sump. However, the composite spacer gasket is available on e-bay USA as an Escape gasket, but for years 2001 to 2003. It's therefore reasonable to assume that the sump changed at 2004. Here's a clue..........
I found this entry:
2004 FORD ESCAPE XLT 3.0 DURATEC 24V DOHC V6 OIL PAN

The groove and seal is clearly visible here.

OE part numbers are quoted as: 5L8Z-6675-AA, 7L8Z-6675-A and ZZC2-10-400
Also fits Mazda Tribute and Mercury Mariner.......
Dorman make a replacement steel oil pan for $63, but it's as deep as the alloy sump, athough it would be easier to modify. Obviously the Ford Escape also suffers from sump damage or this part would not be available!!!