how can I locate Premier Auto Finance? They financed my car in 2000, now I can’t find them?

i recently received my title for my car which was stolen in 2003 and at the time i was under bankruptcy. i completed all my payments earlier this year, but thought that the insurance company had settled the claim and that they already had the title. I need to find out where they are so that I may know why they sent it to me and I have no car are scrap to show for it. They sent to the title through another company and the letter sent from my trustee on my behalf for completion and discharge of my case was sent to me as undeliverable. I need some tips on finding this company. Can you help?