With money, anything is possible. Nissan guys do this quite often with a mix of skylines and silvia's. I personally like the mixture in certain cars, but in others the lines don't flow well at all. You would have to see if the front wheel base's are of equal length or at least very close in proximity, and other than that...I don't think there is that big of a difference. Just keep in mind that you'll have to weld the radiator support from the 07 on the 01, and some other easier things such as rewiring the headlights, turn signals, fog lights(if equipped), and things like that. I don't think it would be too difficult if you have some fabrication skills.

 

Every jaguar owner I know likes everything about the new coupe EXCEPT the front end (which has been compared to a 4th gen. Ford Taurus). Interesting that you like it better than the old one.

Anyway, you should think about using a front end from a 2006 XKR instead...that's what I would do.

 

Call me crazy but I think if you do this, your resale value is history.
What you consider an improvement, a potential buyer down the road
may see as vandalism.