andy_k_250 - there's already an email/letter/call campaign being spearheaded by The Bizzle in General Star Wars Discussion (too many threads to link them all) that you might be interested in.

As far as already having 72,000 signatures, I'm not so sure:

Originally posted by: Jay in the original originaltrilogy.com petition
Perhaps a Limited Edition run of the original films along with a Special Edition release would be in order... Your devoted fans would more than likely purchase both an Original Trilogy release as well as any Special Edition versions.

It seems like this request has been met (albeit not to everyone's satisfaction).