Binderies used by Michigan libraries include:
The Bessenberg Bindery in Ann Arbor is the best for repair and restoration of old books. They also bind serials and make new books, but their focus is definitely on repair and restoration.
The HF Group, formed a couple of years ago by the merger of Heckman and ICI/BUI.
Hoag & Sons specialize in newspaper binding.
Wallaceburg Bookbinding in Wallaceburg, Ontario.
Wiering Books in Grand Rapids does excellent restoration of leather and other bindings (phone: 616-248-5434).