Originalist justices

I posted the following comment on a message board on September 15, 2008, but didn't get much of an answer:

Last night 60 Minutes played a rerun of an interview with Justice Scalia that originally aired in April. In it is says that Thomas is the only other originalist. I was surprised by this. What about Roberts and Alito? I have heard about strict constitutionalists, but is that different?

The website includes video and a transcript. The part I am referring to is around 8:25 in section 2. Here is what the transcript on page 7 had: "Scalia deferential? That's something you never hear about him on the court, where he has been unable to persuade his fellow justices to come over to his way of thinking. The only other originalist on the court is Justice Clarence Thomas."