I usually FMQ my own quilts, but once sent out to a longarmer I found on the web. Not sure if I’m allowed to post the name of the company here.
I mailed in the quilt top and a pieced backing. They provided the batting, the thread, and the return postage. I opted to bind it myself, but they offered that service too for an extra cost.
It was back in about two weeks, and I was happy with the quality.