And then machine stitched along the lines in a dark gold thread:
It doesn't have the detail of the original but, again, who cares? I found six cheap black buttons at Hobby Lobby. I spray painted them metallic gold - a nice thin coat so some of the black showed through. Then I added the buttons down the middle. I wanted to button to be in the middle of the tunic like his so I put the button on an elastic cord and sewed it down so it was suspended over the opening. Then I got another elastic cord (that would just barely go around the button) and sewed a loop on the other side. It totally worked! You can see the stitching on the bias tape but, again, who cares? (I'm going to be saying that a lot with this costume!)
Then I did the lacing at the top of the shoulder. I cheated and used grommets instead of handsewn eyelets. There are five grommets in the tunic part and six on the sleeve part. I kinda guesstimated on how far apart to place them. In hindsight, I could have put the ones on the sleeve part closer together. Oh, well. Then I just spiral laced them with some soft black leather cord that I found at Hobby Lobby. Not too shabby.