Amy Bunger has done a stitch guide for Lani's "Fairy Yvonne" canvas. Here is a photo of the piece underway.
If you are interested, contact Amy's shop. Please note that Amy does not stitch stitch guides alone. They are part of a package deal, so you will have to get the thread kit and/or the canvas before Amy will sell you the guide.
UPDATE: By the way, Tony Minieri also has done a stitch guide for Yvonne. Harriet just posted three photographs on Facebook. Contact him to get his version if it is more your style than Amy's.