I feel for you, but 2 points arouse my suspicions...
1) If your GTR had been comprehensively insured, you should have been paid out by March or April 2010 should you not?
2) Assuming that your GTR was then not insured, (and it's hard to understand why a person wouldn't insure such a car), the police have confiscated your car as evidence to build their case in a criminal matter perhaps?
For some finite closure, methinks you need a lawyer after all this time! After 2+ years even the fuel will be pretty stale!