Hi mate,
The lock on the fuel line connector that is part of 9J280 as you say is not available separate from Ford. The line itself is $178.
As for the HP fuel pump, have a look at the image below and let me know what parts you think you need. I can price them after your advise.
As for postage $11 should cover all small items up to 500g.
MD Mondeo 2.0 Diesel Fuel Pump.png