Here's an idea that I used quite a lot.
Get two small, matching turkey wing feathers from the same wing (R or L)
Strip the longer-barbed side off the quill using your fingers as such:
Cut off the front 3/4-1" or so:
Apply superglue (gel works best) to the first 1" of the quill and tack it down to the shaft:
Wrap the feather spirally around the shaft, applying more glue as you go. When you get to the end, hold it tight until the glue dries. You can also tack both ends with a stick pin.
Do this in front of and behind the existing fletches. The more your wrap and the higher the feather barbs, the more "air brakes" you'll put on the arrow. Secure the feather ends by either wrapping it with thread or applying a drop of superglue gel. Here's the finished result on a blunt: