SuperScale International produced four-colour lozenge camouflage in two sets: 48-100 Upper Surface, and 48-101 Lower Surface. They are a bit hard to find now, but should you do manage to get them, you can use both sets to replicate the fuselage pattern.
Recently, a new company also produces the lozenge camouflage in decal form: http://www.microsculpt.com/
A few years ago, FSM produced an article that allowed you to replicate the patterns by painting them. They supplied a template (that you could photocopy) in 1/72nd scale and the ratios needed to reproduce it in 1/48th and 1/32nd.