Pretty much anything body/trim related can be a pig to find as ford don't hold stock of everything for them anymore so where it is for sale can be massively over inflated prices....body panels in particular, wings/bumpers so it's just something to bare in mind!
Not so long ago water pumps were also non existant for the car but supply has started again so not such a problem now although they aren't cheap.
There are lots of parts specific to the car and as they were only made for a short period of time and a limited run parts just aren't plentiful that's all, but with the right contacts most bits can be found to be fair