RMC Quilts in Port Huron, Michigan I stumbled on and they specialize in wide backings and Cuddle fabric backings along with flannels, all sorts of batting and long arm services and she ships.
Jacki, the owner was kind enough to take me on a tour of the operation and explain how all of her batting is made and priced....I also got to see where she longarms on her Gammill machines. What beautiful work.
But, the real star of the show is the huge selection of backings that she carries. I was amazed. No more piecing backs for me!
https://www.rmcquilts.com/
Watson
PS....and attached to the shop is a HandiQuilter distributor, Sew You Quilt. Paul was extremely helpful to me while we figured out a part I needed for my mid arm. They carry full longarms to demo, parts and accessories, needles and thread as well.