Off the top of my head, I've used these sources and been happy with them.
Bag of scraps: www.equilter.com
Batting: www.oklee.com
fabrics: www.hayloft.com
www.christaquilts.com
Plus dozens more. By doing a search, you'll come up with more than you can use! Then when you get the pkg, it's like opening a Christmas gift to yourself! Sara