I have found at my local JoAnn's muslin from very thin (good for foundation piecing) to very heavy (more than what I would want in a quilt) the price varies according to the weight of the muslin. They have it in the traditional cream as well as in white. :D:D:D
I have made clothes out of quilters cotton, and remembered why I loved permanent press so well :wink: yes, it does wrinkle easily :D:D:D