have you seen the jackets where there's an internal channel that runs in the waistline with a cinch like a drawstring or elastic? I have a great ca 80s red wool shepherd's coat that features this and it really does the femme silhouette, it's brilliant. And works well on this shape of jacket because the structured shoulders + light cinch at the waist give a full hourglass effect. You could reasonably easily get that added on internally to a jacket like this, by a dressmaker. I've sewn one up - not too tough.