Petrucci uses/d a DiMarzio Steve's Special in the bridge. Actually, his bridge pickup was custom wound, but it's very close to a Steve Special... and it's basically a 6-string version of the Blaze that's in the Ibanez Universes. I'm not sure if it's the exact same pickups in his EB/MM guitar.
I'm not a particular fan of DiMarzios myself and I would never want Petrucci's alternate picking tone (it's full of that awful pick clack... when he speed picks really fast I stop hearing the actual notes and instead only hear the pick clack CHCKHCHKCHKCHKCHKCHK), but his tone doesn't only come from the pickups, far from it. His old tone used to be heavily processed. The new one not so much as before, but there's still a lot of gear it goes through. The Air Norton is primarily a neck pickup (and yeah, Petrucci used that one).
So if I were you I'd look into maybe trying a Seymour Duncan JB instead. If you'll like it, I have no clue.