http://jhittlesewing.funoverload.com/sewing/specials/page_1.html
I have used this online shop for several years...I was one of their first customers...it is a family-owned business...I have NO affiliation, etc., but have always been satisfied with my purchases.
Shipping is a standard $5.90 OR free with orders over $100. They sell wholesale to everyone! They have many products, including Martelli, Fons&Porter, etc., and if you sign up for the newsletter, you get 2 email special mailings every week.
Lots of things you can purchase just one of OR a bolt, bag, or bundle of! Give them a try...I don't think you'll be sorry you did!