This site has all kinds of info and I think easy to follow directions. Hope you post your out come.
I think this may be what you are looking for: https://www.hometalk.com/43411592/build-a-chair-with-a-woven-seat?expand_all_questions=1.
Hi Karen, here are some instructions for making a woven reed seat for your chair. Goo luck with your project. FREE Online Instructions for a Ladder Back Chair Seat -- Weaving a ...
FREE Online Instructions for a Ladder Back Chair Seat -- Weaving a Ladder Back Chair Seat withFlat Reed -- Sometime in the early 1980s, Lestel Childress, ...