McCall's pattern 4696 might be a good place to start. You would have to modify the bodice into a jacket, including adding the bottom sections and the collar. The pattern does have similar sleeves (view E, needs slight modification to upper section).
Another pattern possibility is Simplicity 4059. It's a men's pattern, but the tunic might be easier to modify.
Her jacket is leather, and pants are leather or suede. The under layer jacket might attach to the pants. The leather looks embossed, but if you want a similar look, you can stitch the diamonds in with subtle thread.
I don't know if you're a beginner with sewing, but this project will be a challenge. Good luck and hope this gives you some ideas!