Crazy Old Ladies had a Cabana quilt pattern like this. It's probably out-of-print, but I found it on Amazon:
http://www.amazon.com/Crazy-Old-Ladi.../dp/B00AX5CHDK
Edit: Here it is on the createforless.com website, which I have used in the past:
http://www.createforless.com/Crazy-O...15C=1766337012