I just bought some fabrics from JAQs (
https://www.jaqsfabrics.com/) and Contemporary Cloth (
https://www.contemporarycloth.com/). The latter is having a clearance sale right now, and JAQs always has free shipping on orders over $50. The Japanese fabrics from Contemporary are wonderful. They're heavy, though (nearly home-decor weight). I'm using one in my next quilt.
Both websites have the big brands as well as some lesser-known ones, and a huge variety.
You might also try the Fat Quarter Shop (
http://www.fatquartershop.com/). They have bundles and packages and kits. Don't let the name fool you - they definitely sell yardage