I have checked out the band, and Joseph Stamp, the guitarist without success I am sorry to say.
What a shame they have split up, the sound wonderful, very Metallica, but their current haitus makes finding info difficult.
I have checked out the video, and freeze-framed the guitar shots, and I'm sorry I can't identify the particular brand of guitar Stamp is playing.
I would however pass on the advice I have heard from many wonderful guitarists (I write for Guitarist Magazine) - that owning your idol's model of guitar will not make you play and sound like him, which is a very good thing.
You must develop your own style and sound, and whatever you play that on is of minor importance, it's not the guitar that makes the music, it's you.