Maybe a long shot, but why not research Englishtown Raceway Park's or Atco's archives to see who else was racing during that time period, or maybe names of people who worked the track. Maybe you can run those guys down to see if they remember your car.
I am not at all familiar with ERP but when you do a search, tons of links pop up. In fact, I think Jerry M. is very familiar with that track. Old Reliable raced there as well. Maybe he can find you the right contacts.
Its a big order and I feel your frustration. I've been searching for the original owner of my car since August of 07.