The person who is famous for making a toothless quadsuit
has a deviantart here
. She was selling it for a tidy sum not too long ago, but its already probably been snapped up for $3200. However, I am suggesting her because she may be willing to tell you how she constructed the wing harness in her quadsuit. And she can probably give you pointers on what NOT to do, as per her own experiences. I'd give her a shot.