I found Country Journal on her design page. I wonder if you emailed them and asked to purchase the instructions? Or maybe someone on here has them. Here is the link to her design page.
http://www.maggiewalkerdesign.com/
Look on the left hand column about halfway down. Hope this helps!
ps...I just noticed there is a poster for sale. Maybe you could use the poster kind of like a puzzle box top? Love the quilt. Have fun!