I'd see if Marge Warren (or our own Peter MacDonald) would weave up my tartan in a weathered color scheme and heavy weight, then I'd have Matt make a four yard box pleat out of it... with two belt loops, the usual buckles, and no fringe.

Either that, or I'd have the above tartan woven in Harris tweed and do the same thing.

Nothing overly fancy, but something very fine.