...and if you don't like the UK, there is always Germany, Spain, etc.
However, given the language issues, work with the UK. I have been doing this for well over 10 years with the Escorts, but the Fiesta would be a no-brainer because it was actually built overseas. However, I would worry about part names--they can be different (think boot & bonnet, dizzy, etc.) and I would bet the UK part numbers are different than those used here.
As for shipping, for me my parts get here faster from the UK than from the South or West Coast, US.
The exchange rates are killers these days, however.
Cheers.