Here are some binders who are especially recommended, or already used by some of the booksellers on this site.
Book & Paper Conservators
Emma Lloyd-Jones, 34 School Lane, Fulford, York, YO10 4LS. tel: (01904)633331
Specialist in the conservation of books bound in cloth, leather, paper or vellum. Paper repair. Book boxes and slipcases.
Emma Lloyd-Jones trained in library and archive conservation at Camberwell College of Art and has been employed by Oxford University Museum, Trinity College, Dublin, Tyne & Wear Archive Service, and the universities of Durham and York. She became self-employed in 1999 and currently works for booksellers, private clients and the National Trust.