Preinstaled Norton Inet Security 2011 - LOST KEY

I purchased a new HP computer w/Win 7 and preinstaled Norton Internet Security 2011. I lost (or tossed) the Norton Product Key info that came with it. I did not write the number down or save it to my acct. and I can't get an actual person at Norton to answer how I can get a key that will activate it. Anyone have an idea what I can do?