2 good offerings from patricej!
I've been using eQuilter pretty much since they started and have always had good experiences, mostly I buy sale fabrics (especially backs). Recently one of the other board members did not have a satisfactory outcome with them in their purchases.
https://www.equilter.com/
Sometimes when I'm looking for something specific and am having problems, I go to Fields Fabrics, a small Michigan chain, plus they have fleece and non-quilting fabrics. I would find what I wanted on Amazon with them selling it, so just cut out the middle person and buy direct.
https://fieldsfabrics.com/