I decided to try the bolero/shrug/shirt pattern again. I found a striped turtleneck at the thrift store that I thought would work well with the green shirt. This time, I was able to follow the yoke pattern and double the material, unlike the single thickness I used on my contrastock t-shirt recon. The torso of the turtleneck was just the right size for the yoke pattern. I used the turtleneck sleeves as they were. I should do something with the leftover neck, maybe I'll make a headband.
The v-neck was a bit fiddly and I took a trial and error approach to making this. I'm happy with the results, but think next time I'll work on more accuracy with measuring and cutting -- re-sewing the sleeves three times on each side was a bit tiresome. I didn't make any effort to line up the stripes.