Most of the big AV companies are in a knowledge sharing "club" so it really doesn't matter who you submit the sample to

Try this: http://vil.nai.com/vil/default.asp

AVERT (McAfee), half way down on the left hand side you will see a link "submit a sample"

You might also try going to the Symantec site and try submitting through that?

As suggested, try the Norton technical support. You should at least get a response........you don't always with viruses as the processing mechanisms are somewhat automated?

Cheers