I like the idea of new blades for her rotary cutter. Also fat quarters. If you know she uses batiks, those would be great … or in her favorite colors. Maybe you have an idea of the types of fabrics she uses in her quilts. Machine needles are also a great idea. Maybe some good quality thread in neutral colors (white/off-white/gray). Then include a gift certificate if your budget allows. A local quilt shop might allow for exchanges if she wants something different. She will definitely appreciate your thoughtfulness.