I just found a new shop in NE Wisconsin that is strictly fabrics from estates and ladies that want to sell their stash because they can't quilt any more for whatever reason. She does try to find things for you but I don't know how quickly she gets back to you, etc. She has 2 shops, one in Eagle River and one in Land O' Lakes, Wi. The owner started this last year and you never know what she'll have at any time. I've found some great things but I go there in person. I probably won't be back this fall though because we're packing up and heading to the winter house in a couple of weeks.
The name of the shops is Venerabilia, LLC and the website is Venerabilia.com. You can get the phone numbers from the website.
Good luck.