Not to sound pesimistic but the pickings are slim in the PHX metro. I know 3 people who are looking for the same kind of work. Try looking at Native Air They fly PC-12's and a Caravan out of Williams Gateway.
Call D&D Aviation in SLC. You can access info at www.guides.com/acg Rich and famous- Aircraft Operators- U.S.-Arizona or Utah. Talk to Bob Herzog, Chief Pilot. He's a well respected man. They may still have a Lear 35A based in PHX. Part 135 on demand charter.