Chuck Loeffler is a professional bowyer specializing in the replication of sinew-backed and self wood bows of North America and around the world. For more than 30 years, he has been meticulously conducting research of materials, methods, and construction of ancient bows and arrows. Through his company, Heartwood Bows, he sells replica bows to collectors, bighorn sheep bows, and high end hunting bows that blend the best of all the designs that he has studied. Chuck also holds 4 world records in the Primitive bow class for flight shooting, with the longest shot of 343 yards using a sinew-backed juniper bow. 

Links:

https://heartwoodbows.com/

http://salishwolf.com/

http://projectquiver.com/