Cars used in movies are almost universally provided by prop houses that specialize in short-term auto leasing. Look up the production company for the movie and contact them. If you are lucky and find someone friendly enough to help you, they may be able to find out who provided the car. It was several years ago, though, so it may be tough to find someone who will go through the records.
If you have a good story - such as an NSX club wanting to find the car, etc. - vs just being a pesky fan, they are much more likely to help you. If you don't get anyone on the first few tries (these people are VERY busy), keep trying new people there. Sooner or later you will find a good soul who will help you out. They are not mean, just over-worked.