Etsy: Cali Quilt Co, Sew Crazy Austin, Blue Pacific Fabrics, Feline Drive, Bayside Fabrics, all of these are mom n pop, I've ordered from each several times, especially CaliQuiltCo and SewCrazyAustin.
friendly local quilt shops that sell B&M, online, & curbside: Honey Bee Quilt, Cotton Cupboard are my favorites, Wimberley Stitch Studio, Fabric Frenzy, and A Quilter's Folly are also great. I also highly recommend Blue Bar Quilts & The Electric Needle in Madison WI, they are also B&M, online, & curbside.