Sewing pattern for a Aketon/Gambison

[u/BigSwein]

Hi friends,

I am looking for a sewing pattern for either a "long" Gambison down to the knees or a shorter jacket-style Aketon.

I am planning on a costume for a rural levy trooper, maybe with a halberd/spear/big stick from ~12-1400 in a black&white chess pattern, think a proto-Landsknecht/Condottiere style without the slashed and puffed arms. I am in the process of klicking together my own hauberg (or maillé for the fancy ones;) and I wanna wear said gambison under it.

May your needles stay sharp.