I think a walking foot would take forever, so would just stitching around--because of the curves of flower petals. Can you try FMQing it? Do you have a FMQ or darning foot for your machine? Can you drop the feed dogs? I think you could get a flow of movement to move the quilt under the needle and go round and round making the flower. (I'm assuming, of course, that it is a simple flower as shown in your template.) I can do these with ease myself because I get into a 'swirly' motion...can even trace the flower and follow the outlines . Try it--practice on a swatch. It won't look like hand quilting, but once the quilt is washed, it will look real pretty. JMO