I didn't realize that Susan Portra and Tony Minieri were the first to do stitch guides for painted canvases until Amy Bunger told me. I've done a little hunting and found two of Susan's guides on eBay. This is "Old Saint Nick" from Cheryl Schaeffer, dated 1992.
I also found Susan's guide for "Christopher Columbus," by Damarj. The date on this guide is also 1992.
This is Damarj's "The Stitcher." Unfortunately, the date is cut off. Note how Susan changed the stitching from linen in a hoop to a needlepoint canvas with a geometric pattern.
If you are a history buff, you'll enjoy looking at these.