I am just servicing an 07 fusion with the 1.4 duratorq (what a gutless noisy little thing)
Anyway, Ford parts prices:
Oil retail 32 quid for 5 litres Oil filter 12.96 (and awkward and dirty to change) Air filter 15.85 (delightfully easy to change, but why so dear)
I cannot see why their prices have gone so high in recent months/models.