Pattern for montrose doublet?

[Moosehead]

You might say they are almost identical to an Inverness-style cape, at a small fraction of the cost.

[Nick]

Except that they have sleeves, but they do look like they'd go good with the kilt.

[Nick]

Found something! McCalls pattern M4745. It's a Civil War era costume pattern, and the Union officer has a long fitted double breasted coat. It'll be a simple matter of lengthening and straightening the lapels, shortening the jacket, opening the collar a bit for the jabot, and adding epaulets.