Panopli is ok. http://panopli.co/
My mom just asked me to help her find seam labels online https://wunderlabel.com/woven-labels/text-and-symbol (she still uses AOL!) and found this place offering 10% off first orders if you sign up for their mailing list. Cheap and really easy to configure online.
I have used this company and they are very good, they send you a sample first, before committing yourself. Xx