Binder clips, Gingher designer Scissors (love the embroidery ones), Purple “thang, Clover iron, Frixon pens.

Container to put broken or used needles in, silicone finger protectors for ironing and bodkin.

I hope I am not repeating, but years ago i bought a telescoping magnet from Sears, and it is wonderful for picking up needles and pins that I drop when I am sewing. I second the thread catcher. I also love my magnet pincushions. I have severa,l and each one holds different pins, that way i am not looking for a certain type pin when I am working.

More A wooden iron or finger presser, a hera marker, and a tracing wheel with a serrated edge for paper piecing.

A nice pair of Gingher scissors would be nice. Machine needles, a small organizer, a pattern for a sewing machine cover, and other items she's interested in, a Big Board for her ironing board (ha! not a stocking stuffer!) ;)

Maybe you could make her a pin cushion? (special little gift from you) :)

*Door peephole viewer … helpful to view the whole quilt.
*Grip strips for rulers
*Wonder clips
*Quilting gloves/gardening gloves

What fun!

Wow, so many great suggestions. If she paper pieces an "add a quarter" ruler. A box of Crayola ultra washable fine tip markers. Color filters for determining value https://www.amazon.com/Color-Evaluat...04398699&psc=1

One of these for ease of oiling her new machine https://www.amazon.com/Refillable-Ne.../dp/B004WWYL2K

I also use all manner of drafting tools. I would be lost without my compass and protractor and I also love my flexible curve ruler and stencil of circles in all different sizes. I use these tools mostly to draft out quilting designs so maybe save these tools for a few years down the road.

Not stocking stuffers but inexpensive items to put under the tree: quilting books, preferably ones with loads of patterns like these two:
https://www.amazon.com/Book-Scrap-Qu...f+scrap+quilts

https://www.amazon.com/Fabulous-Rota...40_&dpSrc=srch

Are there any feet for the machine that would be good supplements to what she has?

Good quality sewing machine oil?

AQS magazine subscription?

How about charm squares folded in a fun way??