There is a 50" diameter round quilt that has been available for about 5 or more years, FREE download.
www.redroosterquilts.com/shop/product/freebird-free-circle-quilt-pattern/ . If this does not take you there, google "Freebird by MoMo for Moda", or "Freebird Downloadable Circle Quilt Pattern". In my view, this qualifies as a bargello design. At one time I could find this on the Moda site for free patterns, but a look today did not find it, probably archived. I think you could make the size larger by using a yardstick to extend your 9 degree cutting template. The pattern instructions prints out to 4 pages. Click on the Free Download that is below the picture, clicking at the top will have you going through all of the patterns. Please let everyone know how your quilt turns out.