Replacing X5 keys - Question

[puding]

Hello Folks,

Some one broke into my apartment on monday night and got away with some stuff. I was away visiting my client's location in Toronto, Canada and my wife and 9 month old daughter were at my friend's place. I'm glad that my wife and daughter were not at home when this happend.

Anyway, coming back to the story. The burglar(s) got away with a bag which had my X5's extra keys (second key + plastic valet key). Luckily, the X5 was at the PHX airport parking lot and no harm done. I got home this morning after learning this incident and filed a police compliant.

Now, I don't feel safe thinking that some one has that extra key for my X5 (I'm lil paranoid ....). Would like to replace the complete keys. Can some one let me know the $$$ involved to replace the keys? Also, by any chance, can this be done under warrenty (I know I'm too much greedy ).

Mine is 2004 X5 4.4i with 37xxx miles and still under factory warranty until next year.

Thanks Folks!!!