Kisco is a heaven for patchwork and quilters, and carries a huge range of supplies, from patchwork fabric by the yard, to fat quarters, haberdashery, bag handles, books, wadding... and free tea and biscuits to refresh you after your shopping! (or park the other half while your shopping!)
Kisco is not open to the public like a normal shop, and you need to become a member, and then you will be offered certain dates to come and shop. Check out the full details here. Or buy from their online shop all year round.