Is it in an area you can add an appliqué? Is the quilt one you could sew a manufactured embroidered motif on? If you sew one embroidered patch on it helps disguise the fix if you scatter them around. Can you carefully pick out the stitching on the inner border and sew in a 6 inch new section of border? You would see the stitching joins but it would be less noticeable than a tear especially if you put quilting lines over the joining seams.