I would do a bit of ringing round as I paid £58 for 1 more black key, 1 red master key(had none) and deleting all old keys plus programing new ones, from a ford dealer.
Locksmiths can also do these, these days.
Is it a black or red key you have ?, if you have the red you can programme yourself.
There are loads of minor differences on the ecu's, so not as simple as swap one on.
tabetha