The canvas and guide are both available from Dreamhouse Ventures who distribute Joan's designs and guides. There are also two other spectacular St. Nicholas designs available and I think all three have guides by the designer. http://www.dreamhouseventures.com/shop/designers-showcase/fiori.htm
Ruth Schmuff's lovely essay explains why stitch guides take so long. She's pretty organized, too. Mine take about 40 hours each, spread over 2-4 weeks since I can't work on them except in my free time. That's why I no longer do custom guides! https://bedeckedandbeadazzled.com/2019/10/process/
Needlework Retailer magazine shows off And More's "Texas Santa," stitched by Mickey Snyder using a stitch guide from his wife Julia Snyder. The canvas and guide can be ordered by your favorite shop from And More. https://yarntree.typepad.com/needlework_news/2019/11/texas-santa.html
A Stitch in Time has started distributing their own designs—and I just discovered many have stitch guides available! Some designs have the guides included; some cost extra. Have fun browsing their lovely florals and fun animal pieces, not to mention the many Christmas items available. I assume the guides are written by Alison herself and her amazing staff. http://www.needlepoint-knitting.com/shop/Canvas/A-Stitch-In-Time-Designs.htm
Contact the shop for their guide. If you don't already have a favorite shop, Fireside can order the canvas for you as well. http://firesidestitchery.com
The canvas is from Love You More. Heidi used a stitch guide from Susan Newman at Twisted Stitches in Albuquerque, New Mexico. Contact the shop for Susan's guide. They can order the canvas for you as well if you don't have a favorite shop to handle this for you. https://www.twistedstitchesnp.com
UPDATE: Rosanne's version of this lovely canvas was based on Sherry Bray's stitch guide.
The Needle Works in Austin has a new website now. The shop has a dedicated section for all the available stitch guides! Note that some guides come with the canvas included and some don't.