Eric Bana did an interview with one of the local car magazines down here about the time that the movie was released, and indicated that it was being rebuilt in-between work comittments - I'm pretty sure he said the shell was being straightened out at the time. I haven't heard anything more about it since.
Edit: found some info - looks like he has had it all straightened out. Pictures here
http://www.xfalcon.com/forum/showthread.php?35382-Eric-Bana-s-XB-rebuilt& if anyone wants a look