Polar Fleece
The Secret Workshop caries quite a bit of polar fleece both in the prints and plain including Polartec®. Available through their on-line catalog: http://www.netide.com/~workshopAnne St. Clair of Needle Nook Fabrics has a wonderful array of colors available at a good price. (Tel: 316-684-5989)
Ellen does mail order too:Arlington Fabric 317 N Olympic Avenue Arlington , WA 98223
http://wraptheminlove.org and http://arlingtonfabric.com
The Rain Shed's(541-753-8900) supply of Malden Mills(makers of polartec fleeces and berbers for LLBean) Polartec fleeces, Berber, and Shearlings. For $5.00 I received a large box of all fleece samples(4x4). It contained a great selection of solids and prints of different weights. They also have a great catalog of fabrics,patterns and accessories for outdoorwear.
1. Quest Outfitters in Sarasota Fl. (941)378-1620
2. Seattle Fabrics in Seattle, WA.(206)525-0670
Some information on various types of polartec at http://www.kokotat.com/insla.htm
If you're really interested in a Polartec coat, I strongly urge you to spend the extra for Windbloc... it is just as easy to work with as regular polar fleece, and greatly simplifies construction while being exceedingly comfortable and warm.
REAL Polar Fleece sources:
http://www.rctfabrics.com/fleece.htm
http://pages.prodigy.com/sewsomething/polarfab.htm
http://www.getcreativeshow.com/sundrop.htm
http://www.sewbaby.com/index.html
http://www.fabricclub.com : has some genuine MM Polartek in a few colors at rock bottom prices...I believe under $7 a yard.