I custom make mine, either with my embroidery machine, or by using the alphabet function on my Janome 6600.
When I first started quilting, I made several tiny 16 patch blocks and pieced them into a rectangle of white fabric, then used my 6600 to stitch out my name and the year. I left several blank to just add the year to later. My problem is remembering to put them on .
On the latest quilt, for my 9 year old daughter, I used a tutorial I found here on QB to add a dedication and bible verse to the binding before sewing it on. It worked out really well. Just needed to think of it before adding the binding. Also helped that the binding is a solid color.