http://www.wetcanvas.com/forums/archive/index.php/t-596844.html
other affordable choices many with rabbets at least 1/2" and wide enough profiles to make the overage not noticeable. http://www.kingofframe.com/http://www.pleinairframes.com/http://www.dickblick.com/categories/frames/#contemporarywoodframesuse offset clips to secure http://www.artright.com/hardware.htm