If she had the quilt made for you and didn't make it herself, it probably cost her upwards of $200-300 to have it made. No matter what type of quilting it has, it will take more time (and we're talking weeks of time - not hours) to deconstruct, put in new shirts and re-quilt. Thank your mom profusely for the beautiful quilt, ask her who did it, and pay them to make a new quilt from the missing shirts. Then you'll have two!!