Until you find something better, I think it would be very simple to draft your own oval pattern--a rectangle with rounded ends, and then consider strip quilting it for a scrappy look. You could layer backing and batting, then start with your first strip, right side up,in the center. Doing one side at time (starting from center), sew strips right side together, pressing each addition over after sewing. You could always applique on top, flowers, butterflies, whatever, and then bind.