This is available in kit form, the kit includes the yarn and the pattern.

Large-Xlarge
http://www.marymaxim.com/ribbed-shell-lg-xl-42-46.html

2XL -3XL
http://www.marymaxim.com/ribbed-shell-2xl-3xl-50-54.html

Mary Maxim is the largest mail order merchandiser of exclusive needlework and craft kits in North America. Mary Maxim began …with hand knit designs in the early 1950’s. Influenced by the beautiful wildlife in North America, Mary Maxim designed bulky outdoor zippered jackets to knit using the first easy-to-follow graph-style charts created. Designing has grown to include fashion in all weights of yarn, beautiful afghans to knit and crochet and decorative latch hook rugs. We also carry exclusive kits in needlepoint and beading and offer specially chosen kits from other craft companies. Our website offers much more than we could print in one catalog including paint-by-number kits, jigsaw puzzles and fabric.
We believe there is nothing better than the gift of creating something by hand. The satisfaction and sense of accomplishment one feels from making something and sharing it with others is a rewarding experience. We are honored to be a part of helping people find this happiness for over 60 years. We are dedicated to helping people discover their inner creativity.
If you have questions on this pattern or need assistance understand and working a pattern, please call Project Assistance at 1-800-962-9504.