Just get an ordinary jacket pattern and substitute the material with your quilted blocks or quilting fabric. I have made several like that. It is easiest to cut out the whole pattern using flannel material (or plain cotton) and then attach your pieces to the flannel. That way you can quilt each oanel before sewing the complete jacket together. Then finish the edges with binding in the same way that you do a quilt. I have also made a jacket from a quilt that I made but never used. Good luck with your project.