I was thinking of the "So you're going to wear the Kilt" mods as well, but I didn't know the OP had a copy, so this is what we are looking at;


These ideas are based on the British combat, or "Ike" style jackets, cut I would guess to come 3 or so inches below the top of one's kilt.

Keeping in mind that everyone is built different, IMO I see the jacket in Manfrozeninaglacier's photo as being a little too short to mimic a military cut-away or civillian Argyll, and still a bit long for the Ike style. I'd think shortening it up a bit and adding a finished waistband would look good and should be high enough to cover the lower pocket issue.