I shouldn't have said "I don't think it's Grant Stewart" as it is Grant Stewart. The track is "Junka" from John Marshall's album Frisky, recorded in 2004 with Tardo Hammer, John Goldsby and Jimmy Wormworth. "Junka" is by Sonny Clark and its first phrase is very reminiscent of "Milestones" (first version), but then it goes its own way.